Sorry but ou're clearly wrong. I have my eight Pro in my hand right now and it's clearly smoother. It makes sense though -- as there's no ltpo technology built in. If you're constantly locked at 120 hertz you're going to have a smoother experience.. it's physics.
Anyone with half a brain can clearly see the difference. The normal OnePlus 9 is undeniably smoother than the 9 Pro also, (friend has one) for the reason I just mentioned.
It's night and day obvious. My S21 Ultra is slightly smoother too. Don't be a ding dong