The truth is that you don't have access to the code that runs either of these operations, so will never be able to know what sort of rigging takes place. There is very big money to be made if a casino is able to gain even an extra 1% advantage in the odds versus the player, so they have great incentive to manipulate games in their favor. However there is a conflicting reality which is - casinos don't want to annoy people any more than necessary, like by making them lose more often than at another casino, because the player is always going to lose but they might notice the difference in frequency. A casinos job is to milk the players as much as possible, which they can do by being perfectly transparent and telling people up front the odds. I highly doubt many casinos abuse this position, because just being honest is super lucrative.