I have a 32GB S3 and have had some "quality" time with the S4. Here are my findings on some main stuff:
Build: Same materials but S4 seems better
Display: I do not notice a real practical difference at normal viewing distance, but the extra .2" with the same dimensions is impressive. The display is better though. S3 = VERY good and S4 = WOW
Touch response: S3 and S4 are both great
Sound: The S3 is very good and so is the S4. I still prefer the iPod 5, but they are close.
Signal reception: Only can test around a store so FWIW, dBm appears similar to the S3. No wifi test.
Speed: Though benchmarks are far better with the S4, I do not see this with games, how fast they load up, or the UI. The UI actually seems a tad slower (just like the AT&T version). I will test game emulators today to see how the real world cpu function is. I test the game Dead or Alive+ using MAMEreloaded. The only device that plays it even near playable is the iPad 4. Every other device chipset tested (Snap dual, Tegra 3, 4470) the game is sloooow.
Heat: The S3 gets hot in certain situations and the S4 gets hotter. In fairness, all devices this size get hot since a lot is happening with the cpu/gpu, radios and display. The 300 in the S4 uses the same fabrication process as the dual Snapdragon in the S3. It does not take much to figure and expect a device running faster and twice the pixels to push will get even hotter and it does. The S4 display to the touch gets hotter than the S3. Not a surprise to me and understandable.
Camera: I always thought the S3 had a good camera, but the S4 has an amazing camara and is an optical zoom lense away from making a lot of standalone cameras pointless. Digital zoom regardless of software tricks is still just a digital zoom of an image (not a real zoom).
I must admit that I now feel less ticked-off about Verizon not offering a 32GB model. Yes, the display is better and the camera amazing, but the reception seems no better and the actual speed when using does not seem much of a step up. I wonder if part of the issue is the 1080 display, since twice the pixels for the GPU. The reason the iPad 4 blows all other current devices aways is the bigger GPU to handle the extra pixels.
Of course, if I get to venture beyond the perimeter of a store and discover the reception really is better and I test Dead or Alive+ out and it plays smooth (I am a gamer & love MAME)- I will go back to being very ticked-off at Verizon.
Simple summary is IMO the S4 is not the same mega step up the S3 was, but if you are fine with 9GB of app storage (many are), the S4 is a worthy upgrade. If storage is an issue, the S3 is more than fine until something else with more storage does come along.
Added: I find about all the extra sensors and the stock software a bunch of fluff and not worthy of losing almost 2GB of storage for. The camera features I like, but not sure how much space is taken up by that (my guess is not too much is).
Device(s): S3 I9300 running Carbon rom (4.3) but seriously flirting with 4.4 KITKAT!! builds lately :)
Carrier: 3 (three) UK £15 p/m unltd data/txt
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Also ive just read someone talkin about the developer options menu being hidden on the s4. Getting into that and lowering the scaling should make a big difference. On 4.2.2 on the s3, dev options is activated by tapping the "build number" in "about device" seven times.... im guessing it will be the same on s4?
Yep, I tested longer today as well as the radio with the VZW version:
UI is better with all the fluff turned off. It is now close to the G3.
Radio seems no better than the S3. Actually, the S3 was 1 to 3 dBm better, side by side more times than not. Not enough time (or brevity- not my phone) to test in fringe areas, but I call them a wash in medium to good signal areas.
I tested with MAMEreloaded 1.39 and games like Dead or Alive are a little better, but still way too stutter slow to be playable. The iPad 4 may have a dual core, but it still is faster than any other chipset in a portable device as far as CPU. Nothing comes close yet to the A6X. The A6X in an Android tablet would rock.
Not enough time for battery life. All I know is the S3 has good battery life, unless in weak signal areas- It is awful then (I turn the data radios off in weak areas).
The S4 gets warmer than the S3 even with normal use. There is no doubt after testing with three S4s from two different carriers. Not hot, but feels warmer. 3D gaming gets fairly hot, but so did the S3.
Did not test GPS, since forgot to.
I am now done unless a 32GB is released, since just looking at the 9GB storage in settings makes my app/game loving heart cringe. I have 6.1GB free right now on my S3 32GB and use the apps. No app juggling for me, thank you.
Nice device, IF Verizon ever releases a 32GB. My 64GB card worked fine in the S4. That is where I keep my video, mp3, pics and console & MAME roms in.
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The Samsung Galaxy S3 is the company's flagship device of 2012. As one of the most anticipated devices of the year, this device is the first to come with a Exynos 4 Quad processor. It also has Android 4.0, a 4.8-inch 720p Super AMOLED ... Read More