BM has a waaay longer history and an impeccable record. They have the best limits, the best interface, the best customer service, etc. Only thing I can complain about is they will take away your BetPoints (a promo where you get cash rewards for betting) if you make too much money. BoL is a baby by comparison, too lazy to check but I don't think it's been around more than 5 years. 5Dimes is a pain in my ass and I can't recommend it to anyone playing with real money. ($500 average bet or higher). If you're purely recreational and a small player it's probably fine. In fact, 5Dimes can be considered better for small players because they offer all kinds of cool props.