There are several different versions of blackjack, each with unique rules and features that can significantly alter gameplay. For instance, Spanish 21 removes all 10-value cards from the deck but offers favorable rules for players, such as higher payouts for certain hands and the ability to surrender at any time. Pontoon, a British variation, uses different terminology and rules, like requiring a five-card hand to win automatically and both dealer cards being dealt face down. Blackjack Switch allows players to play two hands and switch cards between them for a strategic advantage. Progressive Blackjack includes a side bet that contributes to a growing jackpot, providing the chance for substantial winnings. Each version emphasizes different strategies and player experiences, catering to a variety of preferences and skill levels.