Stake's dice game lets you double your money if you roll over 50.50. That leaves a narrower range of losing rolls, so your odds of winning are 49.50%.
BCH. games makes it tougher - you might have to roll over 50.99 to double your money. Lower odds for you means a higher house edge.
It's subtle, but those little tweaks in the game mechanics shift the math in favor of the casino more at BCH.games. So over time, across lots of bets, it works out to a 1% house edge for Stake and 2% at BCH.
Yes, it's similar for other games as well.