When I was looking for Puyo Puyo Tetris on Amazon, I saw a game called "Puyo Puyo Tetris S" ("ぷよぷよテトリスS"). It was a Japanese import.
I couldn't find much information about it online other than the fact that it was for Nintendo Switch only, and I even went as far as getting the demo for it, but the only difference I can see is that it's in Japanese (and that the vibrations are much stronger for some reason).
Is the only difference between them just regions? Was the game "Puyo Puyo Tetris S" simply re-released under the name "Puyo Puyo Tetris" to western audiences?