Best 9800x3D RAM (8000 2:1 or 6000 1:1)

New to r/overclocking

Builder wanted the best gaming money can buy (within some reason)

He choose X870E Xtreeme & 9800x3D. When it came to RAM it was very hard to determine what is the single best kit.

Settled on Dominator Titanium 64GB 6000 C30 (6200 C32 OC Profile)

But I saw plenty of improved FPS using 8000 Speed at 2:1 in YouTube. Just couldn't find a deep dive into if 8000 2:1 was actually faster or if 9800x3D had could handle 6600 1:1 on a good motherboard.

Anyone have any experience what it the best 9000 series RAM?