I think Omaha is easier to make money in.
Something funny happened to me yesterday.
I went into an Omaha freeroll without knowing how to play — I'd never played Omaha before. And just to pass the time while I was figuring out how it worked, I started being very aggressive with my bets, and went all-in a lot. It was a tournament with more than 500 people, and I finished in 70th place. I won a few cents.
Why do you think this happened?