Really, FFXI is great for people who've not played MMORPGs before, I'd say. It's got all the leveling, grouping, classes, etc. of most MMORPGs, but has a distinct Final Fantasy feeling and story. The graphics whoop *** and world design is very pretty. I've never played any other MMORPGs, but I'm installing EQ tonight and am going to make the most out of my free 30-day trial.
When it comes down to it, different games are better for different reasons, and everyone has a different view of what makes a game good. I personally am madly in love with FFXI, but I'd never discount those who enjoy EQ more.
The visuals in EQ2, however, make every other game look like pong.