For the Game Gear games I really hope M2 are doing the emulation. They usually kit out their emulation games with extras such as different variations. So there’s a good chance they might include the Master System versions. Sometimes they even hack the Roms to add new features, but I’m guessing with 12 games, there might be too many of them to do that. If it’s not M2, then I’m guessing the Game Gears will be no frills.