This runs contrary to most of the benchmarks I’ve looked at but fair enough. After a certain point, the differences become meaningless
Its why ive found from my own testing, other milage may vary as I have both cards.
What I found with all the benchmark videos is they don't give you all the information, as most will say running at 5.3GHz and RAM running at 4266 for example, but there are a lot of settings under that which aid to increased FPS. As WZ performance can be hugely effected by RAM setup as you can get strong gains there over a stock setup, this also helps with lows as well.
I also assume you have tuned the config file for the best results for your CPU and all options in game?