I played FFXI for 4 months
I haven't played WoW at all
And I'm already going to have to say WoW >>>> FFXI
I didn't enjoy FFXI much, it had a nice community (not saying WoW won't) but, I like to solo when I want, in FFXI you are required to part to gain any experience past level 10 (Well, basically, unless your a beastmaster) and the parties in FFXI are all basically within 2 levels of each other (Other wise you won't get as good exp) such as Lv 20-22, or 34-36, but there are lots of people to party with. Also one of the main reasons I quit is because after about level 40 you need a static party to level up, and I didn't have time to have one. And unless your a White Mage or Red Mage, you might spend alot of time looking for parties in FFXI...
I'm hoping WoW is more closer to EQ than FFXI
Ex-EQ Lover, actaully I was considering going back to EQ today until WOW comes out =\