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Yep, there are a few rooms in Elysia that are nearly identical (those mini elevators, but they have different door layout). But in Metroid Prime, there are many many S shaped corridors between rooms, most of those have the same texture and overall shape, mostly in the Chozo Ruins and Phendrana Drifts, the other three sections have more varied rooms. The difference between Prime 1 and Prime 2 is that the second has very few corridors (and none are identical) and more normal rooms.