windowed vsync

So I've got a Ryzen 5700X3D CPU, an RX 6600 GPU, 32GB RAM and it runs modern games such as Rust and Valorant perfectly fine at 700 FPS. But for some reason a 2D flash game called Transformice doesn't run like it's supposed to. Although the in-game fps counter seems stable, the game itself is...

Does traditional windowed mode v-sync have way less input lag than the traditional v-sync? Will you always get windowed mode v-sync no matter what, and what happens when you enable v-sync in windowed mode? Does windowed v-sync get overridden? Would it technically be more beneficial to play in...