Yeah, apparently the Genesis branding was for North America while Mega Drive was outside of there.
The tower of power in North America was the SEGA Genesis paired with the SEGA CD and the 32x.
The first one was the Master System, then after the Genesis came the Saturn and Dreamcast (I think in that order but they were so close together it’s hard to tell). And there was the Game Gear portable system, simultaneously way better and worse than the GameBoy. Did any of those also have different branding outside of NA?









Just did some reading. Apparently “Genesis” was already overloaded outside of NA and they opted to change the branding rather than possibly need to fight a legal battle.
And the Dreamcast used GD-ROMs because DVDs were open but required license fees, and the standard wasn’t fully set when it was in development. Plus they figured it would help avoid piracy using a proprietary disc format, though didn’t work out that way.