Perhaps on the surface there is no discernable difference between blackjack and 21 games. But obviously there is. Or I would not be about to tell you about the differences now would I?
So, yes, there is a difference between blackjack and 21 games. Actually there are only two differences, but they are very glaring when you stop to think about them. In fact, once you know them you can never un-know them and they will be forever in your mind