Well well, the Galaxy Nexus. As pissed as I am regarding the name (to me, it's a Nexus first and a Galaxy second), I can't stay mad with most of Samsung's decisions.
It is well-know what the device consists of so I won't repeat.
Things that really annoy me include the low level of ringtone and the inability of android to de-select any camera sound (terrible with in ear monitors such as my Shure SE425!). I also get -few!- signal drops, but that seems to be O2's fault (my provider in DE).

Anyway, compared to a friend's One X, this wins because of software (and I hate the One's camera design on the back). Compared to a friend's iPhone 4S, this wins because of screen, plus I usually get things done faster with android than with iOS.

Worth moving from my Nexus S? You bet.