I'm going to have to say OOTP is better. I get so much more invested in my games than I do in the real MLB season. Either way, go Rays!
It's also strange (if I'm playing an MLB league) to see a player who has become a superstar in my world appearing as a rookie in real life. I've had that happen a couple times so far, watching the final games and playoff games of teams I otherwise wouldn't get to see.