Or the current engine of the Studio in it's current state, they will not have stopped developing it/optimzing it for Switch after torna.
I would agree that they use a more modern engine for the remake. In the scene where Shulk lies in the grass and looks at the dragon-fly you can see a similiar effect to the "colour bleeding into environment" effect that surrounded Torna characters (perhaps to simulate a depht of field effect), just more decent and perhaps more refined. You see it on Shulks cheek and the Dragon-Fly. Also the lighting and shaders remind me of Torna quite a bit, although they use less flashy colours etc.
They are developing the engine for future games and yes Torna used a bit more modern variant. Performance was better and i think resolution in handheldmode was a bit better, but not by much. That doesn't mean too much for this game though as i doubt they stopped optimizing the engine. We will have to wait and see though.
