I played at the time of arcades and PS1. I see some comments comparing company versions and this is totally absurd. There are several versions of the same game, you choose the one that best suits you. Speaking of the game, it's really cool whoever likes the KOF Series can buy it and have fun.
I like the games I buy on GOG because, unlike other ports, you don't need to buy a new computer to play games from the 80s, 90s, 2000s. Put more versions of Street Fighter, The King Of Fighters, and some old nes games like old Battletoads, Ninja Gaiden, Bomberman. As you have a contract with Bethesda, see if you can get the Rare Replay, I couldn't find it anywhere to buy it.