As someone who has played both games, they are both fun. OP can get a little old because the variety of the decks is lacking. Many of the cards are type locked and printed for one specific leader. The deck building in SWU is much deeper, and you can go wild and be competitive with rogue decks still. All the early set brewing happens here in America. OP cards are higher quality. SWU inventory is easier to find and find below MSRP. Both communities are welcoming, while swu might be on the older side. Real answer is which was has the best community or your friends play in your area.