Super Fun 21 is a variation of Blackjack with more player-friendly rules. It offers bonus payouts for certain hands, such as paying 1.5 times the bet for a six-card 20 or less, and players win 1.5 times their bet for a Blackjack, even if the dealer has one as well. Unlike standard Blackjack, players can double down and split any pair, including Aces, and the dealer must hit on a soft 17. Additionally, Super Fun 21 typically doesn't offer a surrender option, making it a more advantageous version for players compared to traditional Blackjack.