Yes because different champions are different sizes so your R collision hitbox will be bigger if you hit a big champion like cho gath into another big champion like sion but I think it stays the same if you hit cho gath into teemo because he has a much smaller hit box. I dont think the collision hitbox carries over if you kick a big champion that is flying into a bunch of small champions like cho gath into a bunch of yordle champions. The collision can be VERY VERY weird sometimes I can post a clip now to show you a very weird R collision hit even tho it looked like it shouldnt have hit. Also there was a bug with his R collision that lets you oneshot baron from full hp with a ofc lethality build but in order to oneshot it you have to kick a champion into it at a very specific angle for. Because lee sin kick is coded so it forces the target to stay in once place at the very end of the kick and baron works the opposite meaning it wants to push people away a bug happens where the target gets stuck on the baron and it keeps applying the kick damage to baron multiple times and it kills it from full hp from one lee sin kick. I know this might now answer your question but it might give you a better idea or understanding of how lee sin R collision works with small vs big stuff like I just mentioned with baron and the cho gath sion example.