My fav is freebitco.in though. Gosh... I have 20k sat there from the faucet, and all I want to do is use it all for betting, ha!
There is no significant differences between freebitco and other gambling sites. This is a faucet site along with gambling feature. One very big advantage of freebitco must be you can have multiple faucet claims unlike typical gambling sites which are allowing to have only one.
Other than freebitco, yobit has dice gambling but their main business is altcoin exchange.