I tried both versions. The rapier build had some stuttering issues that made some rooms almost unplayable. But I'm pretty sure that's a hardware issue, the laptop I played it on is garbage. I'll give it another go with my pc the first chance I get.
I think my issues had more to do with the loss of control due to the physics simulation rather than the physics itself though.
The game was asking for me to precisely control multiple moving parts (at least the player and one object in any given puzzle), and to account for how the realistic physics would naturally disrupt that precision. If the simulation were changed so blocks couldn't rotate and all momentum was cancelled when gravity changes it probably wouldn't have nearly the same control issues.
Sorry if my original comment came off as harsh. I do like the game, physics aside, it's very well designed with interesting puzzles and I'm shocked by how much content you crammed into 9 rooms. So most of my frustration really comes down to the fact that I want to play it but have a hard time doing so because of a single issue.