The two phones are actually very similar in the chassis size and screen response. It's impressive that Samsung has actually managed to shrink the innards of the Pixon 12 to make it even thinner than the original, although there is an obvious difference in that the screen is 0.1-inches smaller.
Well, it's not a huge difference, but you don't often see touchscreens getting smaller these days.
The camera abilities of the two phones is similar in many ways, with the Pixon being the original step up to a plethora of camera options on board a phone for Samsung, but the Pixon 12 takes it up a notch with the likes of Smart Auto mode as well as a Xenon flash, where the original packs only a cleverly disguised power LED.
The original Pixon, with the larger screen, came with a stylus though - we're not sure why the new version doesn't when it also packs a resistive screen.
The build quality is immensely improved on the Pixon 12, as the original model felt a little cheap and plasticky.
However, you know you're paying for it. While the original Pixon was one of the first 8MP cameraphones on the market, it retailed for around £100 less than the Pixon 12, so it may even be worth checking out the original Pixon if the £500-odd price tage of the Pixon 12 is too much for you.