Blackjack odds vary significantly depending on the individual game rules. The Soft 17 rule, the number of decks in play, rules around whether you can double after a split or re-split aces all have a big impact on the odds. The Blackjack payout ratios also influence the house edge. The odds of online blackjack games vary depending on these rules rather than on whether the game is live or RNG-based, unless you are a superb card counter and can influence the odds in a Live Dealer game.