The entire game is actually from Simon-3's perspective (spoilers!)

[1eyedking]

No, the game perspective just changed in that part from simon 2 to 3. We played the with a lot of Simons. That's all.

cantremember's point is that, because Simon-3 has identical memories to Simon-2, therefore: 1. you being ONLY Simon-3 and 2. you being Simon-2 but then switching to Simon-3's perspective are identical experiences, they describe the same narrative arc.

You're both right, because there is no coin flip.

They're two very different perspectives. One of them is a memory of doing things and the other one actually is actually doing them, physically. Simon-3 never powered up Upsilon, never picked up Catherine, never got inside the Curie, never went to Theta, etc. His will and consciousness was never made manifest before his creation, which was after all of these things happened. Simon-2 did this, not Simon-3.

Furthermore, from a purely strict narrative perspective, we play as different Simons - otherwise only a video would have played from what happened since Simon-1 to Simon-3.