First off, what exactly is casino blackjack? Casino blackjack is a way of differentiating between blackjack that is played online and blackjack that is played in a brick and mortar casino. Without having to say blackjack in a brick and mortar casino every time.
So now that we have that established, what is the difference between?
First off, when you play blackjack online you are playing alone. It is not like some of those online poker rooms in which you are playing at the same table with other people that could be anywhere in the world. Online blackjack is one on one play between you and the dealer.
This does not sound like a big deal but it actually has quite an impact on your blackjack odds.
In blackjack, even with basic strategy, you are playing with less than 50% chance of winning a round. This means that you have a greater chance of losing than winning a round. And the more rounds you play per hour, the larger the chances of losing more money. This is why online blackjack players are cautioned to slow their rate of play.
When playing at a full table, like you can do with casino blackjack, you might only have fifty five rounds in an hour. But playing one on one in online blackjack you could wind up playing upwards of two hundred rounds in a single hour.
So one of the differences between online blackjack and casino blackjack is the change in the rate of play simply because you can only play one on one in online blackjack.