well, first of all, I own AN7.
it's been awhile since i read the reviews, but i recall an7 being considered as "nf7-s v3". (mind you the early bios versions werent the most stable and working ones). not sure about the nf7 details, but an7 has lots of oc options, including the uGuru. also sata, firewire, digital audio...and of course the funky placed ide connectors!
Why don't you just go straight to the sources.... www.abit-usa.com
Nf7-S v2 has everything you just mentioned PLUS a couple more options...I've never heard of this 'considered as v3' that you mentioned...I'm not saying it's a bad board by any means, but when it came to socket A overclocking it was always the NF7-S v2, and yes I did own one of those boards so I'm not just recommending it for the hell of it.
Not only that but there's a crapload of modded BIOS's for the NF7 as well from good sources like TicTac who is pretty reknowned for his modded BIOS's....pretty sure he did a couple for AN7 but don't quote me on that
Uguru IMO sucks...both boards have it, but yeah never much cared for it myself...the chipset voltages look to be the same, but I don't remember what the NF7s memory voltage goes to off hand.