(btw this doesn't only happen in Gfaqs)
Sometimes there are games that bear the same name and in some cases, the same boxart. But they are completely different games. Case in point, let's take a look at TMNT (2007)
https://gamefaqs.gamespot.com/pc/934474-tmnt
https://gamefaqs.gamespot.com/gba/937405-tmnt
Despite having the same name and boxart, I makes sense to set them apart in different pages because they are indeed completely different games, the GBA one being a 2D game.
Now, let's take a look at Mario Tennis:
https://gamefaqs.gamespot.com/n64/258820-mario-tennis
See, in most sites the N64 and GBC game are grouped together, despite being completely different titles! This happens often in old portable games that happened to be named the same as console games as a "version" of the game
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