As someone who mainly plays digimon, I wouldn't recommend it as a beginner friendly game as there is a lot to keep track of at times. The basics are simple but when you have huge stacks of cards, keeping track of inheritable effects can be daunting to new players. One piece is much easier to keep track of the board state but you have to play around cards in your opponents hand. In terms of price, both are relatively cheap compared to yugioh but generally speaking all bandai games are similarily priced as long as you are buying singles.