In case of Pegs X Stickers, the similarities to Balatro are:
1. The points and mult system.
2. Stickers, which is an alternative for Balatro's jokers.
Even though this is only two points, these mechanics are the majority of the gameplay. However, I'm not sure why all of this matters. The similarities to Balatro are not a bad thing at all. I belive that the execution of Balatro's ideas is amazing in this game. I am yet to see another Balatro inspired "peg" game. Therefore, I belive that this game is truly, one of a kind.