Digital Chat Station has leaked more details about the OnePlus 9 and OnePlus 9 Pro. According to the whistleblower, the two devices will essentially have the same displays as the OnePlus 8T and OnePlus 8 Pro, but with smaller punch-holes for front-facing cameras.
https://www.notebookcheck.net/OnePlus-9-vs-OnePlus-9-Pro-More-specifications-leaked-ahead-of-anticipated-March-release.516745.0.html
I didn't get the 8 pro because I had a new Samsung at the time. But it doesn't seem like there is not going to be much difference. That is disappointing Still it has fast wireless charging and I like the camera hole to the side. It has great specs and oxygen os and looks great with fast refresh rates and improved camera. I like it enough to buy it.
alternatively, the iterative improvements could make the 8t or 8 pro excellent value assuming they receive a price cut in the wake of these launches :)
If the camera is greatly improved, as rumored, then that will be enough for me to sell my iPhone 11 Pro and switch back to OnePlus. I switched to iPhone for the camera from a OnePlus.