I'm not sure where to address this issue but Taz-Mania for the Genesis ≠ Taz-Mania for the SNES

They are very different games

While the Genesis version is a side-scrolling platform (explained on the game's wiki page), the SNES is a simple run down the highway, eating a set amount of yellow birds before time runs or "Taz gets tired"...

I understand it's common for games to have differences between versions of the game due to various reasons (different hardware, developer etc) but the games are extremely different in scope and concept...

Gallery

Should this warrant splitting into different game entries or is this better to combine the two different games under one game entry?

If true, then yea, split it into two pages and keep the more detailed version on the current page. Also, it may help to link them to the Same Name, Different Game page.