Neither really..
I game at 3840x2160 60fps, or 2160x1440 at 60fps, so I don't really see all that cache benefit, maybe its because of my GPU? Or it could be the tune I run on my 5900X? There is a large difference between 4450MHz and 5100MHz too, and I don't think the reviewers do that kind of tuning for reviews?
I wont sell the chip, I do like it because I can run it semi passively, and its still 8 cores so its still sort of quick. Who knows, its Friday and the chip has been installed for about 24 hours now, I may go back to the X3D by the end of the weekend.. but I am almost out of Ceramique so maybe not, we will see