This isn't too much of a problem as a year on the design is still aesthetically very nice. Additionally the lightweight, ergonomic pebble design means that both phones are very comfortable to hold – far more so than harder-edged devices like the iPhone 5 and Sony Xperia Z.
Sadly, though, the choice not to radically change the S4's design means that, like the S3, it suffers from some build quality issues. Samsung has a track record for creating phones that look great, but don't stand up to physical punishment all too well. This is a problem for both the S4 and S3, with both phones being prone to picking up marks and dents when met with even the slightest force – in short if you drop either on a pavement, they won't survive the encounter unscathed. This is a bit sad considering the fact other similarly priced phones, like the Sony Xperia Z, HTC One and Nokia Lumia 920 are very robust and make the S4 feel a little weedy and cheap.
Since the arrival of Apple's Retina Display all those years ago, screen technology has become an essential weapon in any smartphone's arsenal. Clearly aware of this, Samsung has worked hard to improve its screen technology over the last year, packing the S4 with a 5in full HD super Amoled 1920x1080 441ppi display that puts the S3's 4.8in 1280x720 HD Super Amoled display to shame.
This isn't to say the S3's display is bad. Even a year on it remains wonderfully crisp, boasts decent viewing angles and colour balance. But next to the S4 it's clear the newer phone's display is just outright better in every way, featuring more vibrant colours and sharper icons.
Winner: The Galaxy S4
Operating system and software
The Galaxy S4 comes preloaded with Android 4.2.2 Jelly Bean overlaid with Samsung's custom Touchwiz user interface. The older Galaxy S3 was released, running the then up to date 4.0 Ice Cream Sandwich Android version, though an update has since been rolled out for the older 4.1.2 version of Jelly Bean. The chief consequence of this is it means the S3 runs a slightly different version of Touchwiz to the S4 and doesn't feature any of the new software features debuted on the newer phone.
Next: Operating system and software