Certain blackjack variations have a higher house edge compared to traditional blackjack. For instance, Spanish 21 typically has a house edge of around 0.4% to 1% due to the absence of 10s in the deck. Blackjack Switch carries a house edge of approximately 0.6% to 1.5%, depending on specific rules. Variants like Super Fun 21 may have an even larger house edge, often exceeding 1% because of player-friendly rules that offset traditional advantages. Understanding these edges is essential for players aiming to minimize losses and make informed decisions about which variations to play.