Im trying to decide which game to start first. Wondering which game has the best real world mod. Id prefer college football or basketball.

Each of the games have a versions of the real world mod, which I think are all good and worth using. Personally, I would recommend you choose which sport you best like and start with that. If there is something specific your looking for a real world mod to have, explore them in the various mod forums to make the decision. Below are some links you can view.

College Basketball
viewtopic.php?f=335&t=33643

College Football
viewtopic.php?f=268&t=33350

Pro Football
viewtopic.php?f=285&t=32174
viewtopic.php?f=285&t=32477

Pro Basketball
viewtopic.php?f=328&t=32714
viewtopic.php?f=328&t=32731