Okay, you keep saying that, so I checked GW2 on Youtube. Now granted, you can only get so much from watching a game instead of playing it, but after watching a Boss fight and a PvP video, I would have believed you if you had told me that it was a graphics update to WoW. I saw less differences from WoW there than I did in SWTOR. So if that's your idea of a game being nothing like WoW, then you have a much broader definition of the word "different" than I.
The main diffrences between WoW and Guild Wars is Guild Wars use of a dodge system that drains a fatigue bar and a dedicated healing spell for all clases so it removed the need for the "trinty" the TANK/DPS/HEALER combo tha WoW uses.
In WoW you have pre-defined roles of someone is a Tank, a Healer, and a DPS, while in Guild Wars 2 every class can play every role to some extent. You cant really see it from watching vids but if you played the beta you would understand how it works.
TES Online mimcks Guild Wars 2's self-reliance system with its Fatiuge bar that lets you block, sprint, intterupt, and negate some hostile spell effects.
It lets each player do more things on thier own so you dont have to need those dedicated role and you dont have to stand around yelling "GROUP LOOKING FOR HEALER FOR RAID" for 20 mintues