While the DS Lite is easily my favourite revision, I think (objectively) the Gameboy Advance SP was the best revision over its predecessor.
If Wii can be considered a revision of the Gamecube (2 Gamecubes snapped together), then I think that's a monstrous upgrade that improved the platform and its appeal tenfold... While it only sold five times better, it probably had to be ten times as appealing to hit that 100M+ number.
Wii is clearly NOT a Gamecube revision. Totally different branding, controller, OS, media, etc. About the only thing they have in common is their CPU/GPU architecture and one of their two RAM types.
Bet with Liquidlaser: I say PS5 and Xbox Series will sell more than 56 million combined by the end of 2023.