I dont have Xbox so no idea about that game.
If you search you find loads of info about the game here.
I never Played WoW, so i cant really say how much they are like.
i would say read the forums and visit this page and have a look at Guild Wars Gameplay Footage.
http://www.gamespot.com/pc/rpg/guild...q=guild%20wars
Just to give you an idea this game is not about level up, this game is about using your head.
You can only carry 8 skills While you are in the game area, but u can change them in town.
So its More about Skills less about lv up.
You cant Buy weapons from NPC you have to find them yourself (ok can only buy called started wepons).
There are no mana or life potions, you have heal your self with skills ( or wait for the monk to heal you)
and the best thing is you pay for the game only no extra fees, only Chapters (next one comming about around Fev 2006)
You can have fun with PvE but PvP is the daddy of the game.
I am sure people will let you know of more features.
Another thing this game is not so hard to play as long you learn how to use the skills and Because you can change the attributes anytime with out penalty (only in town) you can play around with your build.
Good Luck