[T-Mobile Samsung Galaxy S 4] nxneko:
This will be based off the Snap 600 Variant of the S4, Exynos should be the same or perform better.

There are lots of us, who have considered hopping. Many have & many have regretted it while some of us do enjoy the change. Lets ignore the spec battle for a few.

GS4 Pros:

* Easier to Handle

*IR Blaster

*Faster SOC

*Better Camera

*Better LT Support - Due to i9505 roms being compatible with S600 Variants of the device it seems to all be the same until kernel & modem. it means wider support

GS4 Cons:

*Still Laggy on custom Roms/Touchwiz bases

* AOSP would make you lose the features that makes S4 worth it

* 20-30% less battery life then GN2.

GN2 Pros:

*Great battery

*Bigger screen

*Spen features

*more support as of now

GN2 Cons:

* Sometimes can be battle to hold

* PPI

Both devices share a outdoor usage crutch, even on full brightness both are a pain sometimes if in direct sunlight.

Size:

The GN2 Has some more side bezel & is obviously slightly larger due to its .5inch larger display. The S4 takes a more curved approach to the edges which I think looks neater. The S4 Body also feels tighter then the GN2.

Bezels:

The S4 to me personally has the nicer body. Coming from the N2 you will feel at home with button placement, something some find awkward since they aren't used to it.

Camera:

13MP sounds may fancier then 8MP for sure, especially when the sensor is obviously larger on the S4 which makes the GN2s look dwarfed. But realtime shots?

GN2:

Downfall of GN2s slower shutter speed:

GS4:

Macro Quality:

Battery Life:

Depending on Kernel, Rom & usage Average Screen-time for the GS4 is 2.5- 5.5 Hours. GN2 Is way above this going for 7-9 Hours screen-ontime. You will lose battery an average of 20% faster. idle that left my GN2 at 92% after work put my GS4 at 72% with airplane mode, I had a day I left it alone at 71% and after work with no use my GS4 was 19% battery. I was able to juice that 19% for 1 hour and 40 minutes of use with kik after underclocking to 500mhz... else I would have been stranded with no ride.

Thoughts:

If you just bought a N2, I would stick with it unless your under remorse and think its too big. The S4 is an amazing device but you trade off battery life for an IR blaster, slightly better camera...and no Spen. If you want to switch because "Better specs" is all you see, dont. Touchwiz is lagging the S4 & Even custom roms slightly resolve the issue. Exynos 4 may not perform better in benchmarks but real time is were it currently outshines. The GN2 opens everything faster in tests I conducted even if by fractions of a second.

Another thing you will lose is the note taking abilities of the note & drawing capabilities. Using a Wacom stylus is 100x better then your finger.

There is no way to really say which is better. They are two different beasts and in the end you just have to follow your gut on whats more important within their feature sets. Both devices values WILL degrade the S4 will eventually be cheaply contracted & the NOTE2 will be replaced by the N3 without its contract price really dropping much (299/149 STILL!) so there's no reason to factor pricing anymore as choice, rather features at this point.

Both devices have amazing Rom support, if you are ok with battery life sacrifice for a newer feature set and something that is pocketable, Go GS4. If you want a device that will let your creative juices flow, or something to show off your note taking prowess & also is great as both a phone and tablet replacement and need something that you dont have to worry about battery life, go Note 2 if you are a extreme power user.

Either way you wont be disappointed.

~ Happy GN2 to GS4 user

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If you think I should add more to this, feel free to point out what I missed/can add.