Bass is about the same, soundstage is about the same.
Difference between the PC360 and AD700 is as I have expressed on the guide. The PC360 is better balanced, a general all rounder, while the AD700 is for pure sound-whoring. I prefer the PC360, even at $100 more. The AD700 is a one trick pony. The PC360 is more enjoyable, though I don't actually like either for use outside of competitive gaming. They're both solid for hardcore gaming. For fun gaming, I'd get something else.
I honestly would rather own the SLYR than either of those. It may not be nearly as good for competitive use, but it's much more fun, and is still decent for competitive use. If competitive gaming is an absolute must, then get the PC360 if you plan on using a mic and don't want clutter.
I'm just not much of a headset guy, or a fan of headphones that only really one thing well.
Edited by Mad Lust Envy - 4/19/13 at 6:15am