Rocketlake is still 14 nm.
They will be constrained by TDP, Willow cove is huge compared to SKL uarch, not counting higher pipeline latencies to accomodate a higher IPC that will cut in the max frequency.
Ignoring LoL and CS:GO as outliers, the average gaming uplift is ~5% over the 10900K. With a modest all-core OC of 5.1GHz coupled with fast memory the 10900K will have no problems taking the gaming crown, and Rocket Lake will be comfortably ahead if it can clock to ~5GHz. So near yet so far.
There s already fast memory in those numbers, both set ups use 3600MHz RAM, dunno if the 10900K officially support this frequency, as for even higher frequencies not sure that it would gain more than the 5900X..
Besides 5.1 fixed clock wont be better than stock boost at 5.3 given that the chip can use 180W...