Samsung Galaxy S23 Ultra vs Galaxy Z Flip 4: Which should you buy?

Samsung has some fantastic smartphones, but we know these can be expensive. Sometimes, getting a previous-generation device offers more value per buck. If you’re looking for great last-gen devices, Samsung has two great options. Of course, there’s the Samsung Galaxy S23 Ultra, with its amazing performance, camera quality, and improved battery life. If you’re feeling a bit more adventurous, Sammy also offered the Samsung Galaxy Z Flip 4, one of the best foldable phones of its time. Both are now replaced by the Galaxy S24 Ultra and the Galaxy Z Flip 5. How do the two compare? Here’s a look at the Samsung Galaxy S23 Ultra vs Galaxy Z Flip 4!

Galaxy S23 Ultra vs Galaxy Z Flip 4: Specs

The Galaxy Z Flip 4’s unique form factor doesn’t lend itself to a direct comparison. When folded, it has a low-resolution 1.9-inch AMOLED display on the outside, which takes up around half the space of the folded front and is just about usable for notifications and quick device controls. Things are much closer when the Z Flip 4 is unfolded, though. Both come with AMOLED screens and 120Hz refresh rates, but the S23 Ultra has a leg up on the resolution. The Ultra’s 6.8-inch display has a Quad HD+ resolution, while the Z Flip 4’s 6.7-inch screen is limited to Full HD+.

Under the hood of the Galaxy S23 Ultra uses a high-tier Qualcomm processor, one that’s specifically designed for Samsung. We tested the Snapdragon 8 Gen 2 for Galaxy and found that it manages to deliver better performance than most other Snapdragon 8 Gen 2-toting smartphones. Of course, the Galaxy Z Flip 4’s Snapdragon 8 Plus Gen 1 processor is no slouch either, and you’re unlikely to find a huge difference in everyday performance. If you want the better performer, though, it’s the Galaxy S23 Ultra.

The Galaxy S23 Ultra maintains its advantage in other hardware areas. While the base model of the Ultra comes with 8GB of RAM, you can get higher-tier variants with 12GB of RAM. Samsung has also doubled the storage available with the S23 Ultra, with options starting at 256GB and going up to 1TB. On the other hand, all versions of the Z Flip 4 come with 8GB of RAM paired with 128GB, 256GB, or 512GB of storage. Again, this won’t matter to most people, aside from those carrying around a big video library.

The Z Flip 4’s form factor also introduces a few other differences. For instance, the foldable comes with an IPX8 rating for water resistance. However, the S23 Ultra is also sealed and protected from dust, warranting an IP68 rating. The Flip 4 has a side-mounted capacitive fingerprint scanner, while the Ultra sticks to an under-display fingerprint sensor. And, of course, the S23 Ultra’s most significant advantage over the Z Flip 4 and all its competitors remains the S Pen, which fits entirely inside the device. Samsung’s upgraded stylus also offers software features to make the phone a productivity powerhouse.

What stays essentially the same is the software experience. The only difference is that the Galaxy S23 Ultra now runs Android 14 with Samsung One UI 6, while the Galaxy Z Flip 4 is still stuck on Android 13 and One UI 5.1. Granted, the S23 Ultra also has the advantage of being newer and will get an extra year of OS and security updates. But Samsung’s commitment to four years of major OS upgrades and five years of security updates holds for both smartphones. It’s also among the best software commitments you’ll find across the whole industry.

Galaxy S23 Ultra vs Galaxy Z Flip 4: Size comparison

The Samsung Galaxy S23 Ultra is a big phone, larger than the Galaxy S23 Plus in the series. That said, it’s not too different from the Z Flip 4 when unfolded. With unfolded dimensions of 165.2 x 71.9 x 6.9mm, the Flip 4 is slightly taller, less wide, and thinner than the Galaxy S23 Ultra (163.3 x 77.9 x 8.9mm). It’s also considerably lighter than the S23 Ultra at 187 grams vs 229 grams, respectively.

The Z Flip 4 is tiny when folded and around half the length of the S23 Ultra, with dimensions of just 84.1 x 71.9mm. Of course, it’s much thicker since it’s essentially the same as stacking two phones on top of each other when folded. Even then, its thickness of 17.1mm shouldn’t cause any problems with putting the phone in your pocket, courtesy of its small footprint overall.

Not much has changed in the design of the Galaxy S23 Ultra compared to its predecessor. It retains an industrial look with a flat top and bottom and a slightly curved display. The rear cameras remain housed in individual islands on the otherwise plain back. It’s not a particularly exciting look, with function the preference over form. The phone will survive accidental bumps, drops, and scratches better, though, with Gorilla Glass Victus 2 panels on the front and back.

If unique is what you’re after, the Galaxy Z Flip 4 is the way to go. A flip phone isn’t a new concept, but the modern take with a foldable screen is as different as it comes in a sea of standard, candy bar-style smartphones. The Z Flip 4 may not be as powerful or feature-packed as its 2023 flagship counterpart, but where you can’t go wrong is with its distinctive look. Not to mention, many don’t need all those extra bells and whistles.

Samsung Galaxy S23 Ultra vs Galaxy Z Flip 4: Camera

The Ultra variant of the Galaxy S-series has stuck with a 108MP primary shooter since 2019, with the S20 Ultra. So, moving to a 200MP unit is a significant upgrade with the S23 Ultra. The other cameras in its quad-camera setup carry over from last year, though, with a 12MP ultrawide camera and two 10MP telephoto lenses with 3x and 10x optical zoom, respectively.

The jump in the megapixel count isn’t the only upgrade. There are also plenty of software features and improvements to back up the new camera. The Galaxy S23 Ultra can now record video in 8K/30fps, along with 4K/60fps and 1080p/120fps. Samsung says there are significant improvements to low-light photography, or Nightography as it calls it, and 30x and 100x zoom photos. We tested the Galaxy S23 Ultra extensively in our review and found that it delivered some of the best images we’ve seen from any smartphone to date.

On the other hand, the Galaxy Z Flip 4’s dual 12MP rear cameras seem decidedly mid-range in comparison. That’s not to say that these are bad cameras by any means. In our Galaxy Z Flip 4 review, we found that the cameras delivered impressive photos, with excellent detail, highlights, and shadows, and solid portrait and low-light photos. However, you don’t get a zoom lens. Even the smallest Galaxy S23 comes with a zoom lens.

Moving on, one standout feature of the Galaxy Z Flip 4 is the ability to prop it up in a semi-folded state. This can come in handy as a tripod or if you’re looking to take a picture of yourself without anyone around to help out.

The Z Flip 4 comes with a 10MP selfie camera. It’s a solid camera with exciting software tricks, a portrait mode, and the ability to make quick edits. The 12MP front-facing shooter of the Galaxy S23 Ultra also delivers impressive results, even if it seems like a significant downgrade on paper from the 40MP selfie camera of its predecessor. We feel it is a better selfie camera, proving that megapixels aren’t everything in smartphone photography. It also has a few tricks up its sleeve, including the ability to shoot video at 4K/60fps, while the Z Flip 4’s selfie camera is limited to 4K/30fps.

Galaxy S23 Ultra vs Galaxy Z Flip 4: Battery and charging

The Galaxy S23 Ultra doesn’t get a battery capacity upgrade compared to its predecessor. But its 5,000mAh unit is still much bigger than the 3,700mAh battery you get on the Galaxy Z Flip 4. The 2023 flagship also offers faster 45W wired charging (vs 25W on the Flip 4). Both come with 15W wireless charging with a compatible charger. You can also use 4.5W reverse wireless charging to charge accessories like wireless earbuds and smartwatches. It’s far from the fastest charging speeds we’ve seen on current smartphones, but any extra speed will be appreciated.

Luckily, we’ve found that the Galaxy S23 Ultra delivers excellent battery life, even though the capacity hasn’t changed from last year’s Galaxy S22 Ultra. In our review of the Ultra model, we managed around 6 to 8 hours of screen-on time over two days. The older phone would not make it through the second day. In other words, Samsung has improved upon one of its longest-lasting phones. To top it off, it can fully charge within just 57 minutes using a 45W USB-C Power Delivery PPS plug. We have a guide with the best Samsung Galaxy S23 chargers if you need some help finding the right now to reach these speeds.

That said, even the Z Flip 4’s small battery performs very well. In our review, we found that the device offers around four to five hours of screen-on time with average use. Charging speeds aren’t as impressive, though. The Z Flip 4 requires about 75 minutes to fully charge when plugged in. That goes up to 100 minutes when using a compatible wireless charger.

If you regularly push your smartphone to its limits, you’ll definitely be better served by the Galaxy S23 Ultra. Even if its battery capacity doesn’t look all that impressive in the context of previous generations, it’s still a sizable upgrade. Our review found that it delivers upwards of eight hours of screen-on time or two days of use. The Galaxy Z Flip 4 will still provide enough juice for most users, but it clearly prioritizes form over function with its sleek design and smaller battery. In fact, even the smaller Galaxy S23 Plus will offer better battery life than the foldable.

Galaxy S23 Ultra vs Galaxy Z Flip 4: Price

The good news is that Samsung didn’t change the US prices of the Galaxy S23 series upon launch, They cost the same as the previous two S-series generations. The bad news is that starting at $1,200, the S23 Ultra remained one of the most expensive Android smartphones around.

The Galaxy Z Flip 4 launched cheaper, but not by much. It starts at $1,000, but with the equivalent storage as the S23 Ultra’s base, it will set you back $1,060. It’s not cheap, but it is reasonably priced for a flip foldable phone. Still, you are paying for the design and form factor rather than cutting-edge internals. On the other hand, the S23 Ultra was packed to the brim with high-end hardware features to justify its price tag.

All that said, the Samsung Galaxy Z Flip 4 is older. This means you are more likely to find it at a lower price. The window is still pretty wide, though. As an example, right now, the Galaxy S23 Ultra should go for about $800-$850, if refurbished. A Galaxy Z Flip 4 in the same state goes for about $280-$320. Big difference, right?

Galaxy S23 Ultra vs Galaxy Z Flip 4: Which should you buy?

The Galaxy S23 Ultra is arguably the better phone in almost every way. It has a faster processor, more RAM and storage if you want it, a larger battery with faster charging, much better cameras, and better protection. Samsung offers the same software commitment with both phones. But the S23 Ultra has the advantage of being newer. So, its four years of major updates and five years of security updates offer slightly more longevity. This is especially important now that both phones are starting to age.

But the Z Flip 4 is a flip phone with a folding display! If you want to turn heads, pull out a flip phone. The design might admittedly be the only reason to recommend the Flip 4, but that might be all you need. Especially when compared to the rather dull look of the S23 Ultra. Not to mention, there is a lot of value in having a phone that can take up much less space. Many prefer a device that’s easier to handle, pocket, and carry.

It’s also not that far behind when it comes to everything else. You’ll get impressive performance, solid battery life, and good cameras. It is a little cheaper, but that’s not the selling point. My practical side knows that the S23 Ultra is the better phone. And you should get it if you want a powerhouse that can do it all. But my tech geek side can’t help appreciating how unique the Flip 4 is.

Again, keep in mind that both the Samsung Galaxy S24 and Samsung Galaxy Z Flip 5 are already out! You might want to upgrade to one of those, instead. Here are some comparisons of the Galaxy S24 Ultra vs Galaxy S23 Ultra, as well as the Galaxy Z Flip 5 vs Galaxy Z Flip 5.

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