It's about percentages. Traditionally, a part with 50% more performance (the OG Xbone was at 1.2 initially with .1 TF reserved for Kinnect) will show noticeable differences. A Part that is 33% different not as much.
With that said these consoles could both be 12 or 13, or 9, or 10. LOL
Oh wow, I'm finally unbanned from the thread. Go figure. I'll probably get screwed again for some bizarre reason.
Saying there isn't much difference between 9TF RDNA is like saying there isn't much difference between a 5700XT and a 2080 Super/2080 Ti. There's a very obvious performance difference. Difference in graphical or visual capabilities? No, games will more or less look the same on both even if that sometimes mean at different resolutions. They are capable of generally the same things because they are chips of more or less the same exact generation (I say more or less because we know sony and microsoft can mix and match up and down AMD's product and feature roadmap to build whatever they want). So one can simply do more than the other. In fact, it's a clearly bigger performance difference than there was between the Xbox One and PS4. We aren't just talking a difference of teraflops, and the GPUs are no longer held back by significantly weaker CPUs.
There would be a difference in texture units, more than likely memory bandwidth, shaders, There could even be a difference in ROPs (Series X could have more than the expected 64). For example, signs point strongly to AMD abandoning the 4 Compute Engine Max Design they have currently, which means more ROPs could be on the cards also, but I'm just guessing there. Plus, based on AMD's messaging on RDNA2, as well as their own messaging for Xbox Series X in their official blog regarding next gen RDNA, I believe Series X is using RDNA2. After all, Series X is already confirmed to have two of the biggest new graphics feature additions expected to arrive in RDNA2, hardware accelerated ray tracing as well as Variable Rate Shading.
Titles that PS5 can do at max PC settings between 33-37fps at 4K, Xbox Series X should be able to do at 53-57 or even an outright 60. I believe the hardware advancements make this type of gap if it exists a much bigger deal than was the case for xbox one and PS4. We already saw an example of what a gap like this could do with Xbox One X and PS4 Pro. The percentage difference may not seem quite as big, but the TF gap between PS4 Pro and Xbox One X was 1.8 Teraflops, and if the specs as suggested by the AMD github leaks are real, then we are looking at a difference of 2.8 Teraflops this time around. Nothing to scoff at on new RDNA architecture combined with 8 core 16 thread ryzen CPUs imo. These guys that do these driver leaks or whatever you call them seem generally pretty on point with what they're doing most of the time. I understand that there's a lot of context missing, but I don't think they would so grossly miscalculate what they saw and what they're related to. But we shall see.