@W1zzard :
FWIW I think I found the reason for discrepancies in multiple review sites, which exist not only here but on other reviews as well. It's multi-faceted but it basically comes down to memory speeds. See #3 for the quick take.
#1 - Obvious one, if someone is using a 3080 or 3090 on the test bed. This doesn't really seem to be the main driver of what chip 'wins' but it does create bigger gaps between winners and losers.
#2 - Some sites are using much slower RAM on Intel platforms. Example AnandTech, who used DDR4-2933 on the 10900K but 3200 on AMD platforms. A more egreigious example is Cowcotland, who used DDR4-2666 on their 10600K and 2933 on the 10900K. This really only makes any sense if you are buying an OEM system, and if they are trying to 'simulate' an OEM buy they should probably be using all DDR4-2666 on all platforms. That would be irrelevant to 90% of the types of people who visit these sites though (as they don't buy OEM).
#3 - The big one. What I'm finding is that Zen 3 scales very well with higher speed RAM, and if it has high enough speed does indeed make a cleaner sweep in the benchmarks (even with a level playing field where Intel has the high speed RAM too). At sites like Guru3D where they used DDR4-3600 on both platforms, comparing to other reviews, it is apparent that Zen 3 *needs* fast RAM and will outperform Gen 10 in most tests if it has it. This is where you start to see the 5600X beat the 10700K and 10900K (@ stock clocks) in a lot of benchmarks even when both platforms are running DDR4-3600.
So, Zen 3 scales better with high speed RAM and 3600 seems to be the magic line.
Will be looking forward to the memory scaling article. Please do include something from Gen 10.
Edit: PCWorld also used DDR4-3600 on all platforms. In this case, Intel 10900K vs 5900X and 5950X in 5 games only won in one, Metro Exodus.
AMD's historically good Ryzen 9 5900X and Ryzen 9 5950X desktop CPUs have trounced Intel's Core i9.
www.pcworld.com
Because Anand ran their Intel chips at DDR4-2933, and their Zen 3 at DDR4-3200.
TPU ran them both at DDR4-3200.