I created an account at both, but I've only put $ into Draft Kings so far. I put $10 into my account, and got a free $3 play when I signed up. Thought it might be fun, I don't have a gambling problem, so if I don't win, I don't win. That said, I think I have a pretty good week 1 team. At least on paper, anyway. Is there a difference between Draft Kings and Fan Duel?