Ive played both for at least a year.
Currrently Ive cancelled my Eve sub and Im playing about 4hours+ a night on WoW.
TBH, its solely do to who you play with. The corp I was with, the members slowly dropped out due to rl/game issues. However I got really pee'd off with the way CCP only care about the large alliances and 0.0. So after nearly 2.5 years of playing, I quit.
I might come back if they bring in some factional warfare (with funky rewards like cool ships and mybe titles. I like the idea of being a Captain in the Amarr navy), that would get my sub back. But I bet that will take as long to put in as the Titans did.
In WoW, Im in the largest Horde guild on my server, going on regular raids with friendly people and having a laugh in the process. If I want to do some solo content, then i can. If I want to do some PvP, I can without waiting for hours on end.
So for now, IMHO WoW > Eve. But try both if you can and give them both about a month to decide which you like. IMHO a week isnt nearly enough to experience either game.