I would say that both have a long history with the Bitcointalk community and both have no outstanding accusations or bad reviews. They are both trustworthy, if you know the rules and follow the rules of whichever casino that you play on. But if you are going to plan something like neglect the terms and conditions (terms of service/terms of use) then I would advise against it.

Of course you will have to prepare yourself for a KYC.

I say all this because there have been people in the past who broke the rules (either on purpose or accidently) and then whined on this forum about how they are having problems withdrawing from a frozen account. So make sure you learn the TOS.