It would have been informative to know the details of the RAM used in each laptop for these tests.
So one ... erm, "good"... thing about the 5090M really being a desktop 5070Ti is that it limits gaming to the point any flavour of R9 or U9 is going to perform almost identically?...
Avoiding the P core vs E core scheduling issues on this 13900HX would have me favour the R9, if pricing and availability aren't as much an issue they have been with Ryzen laptops for the past 2+ years... But right now it's looking even worse 🤬
I wish comparison was made with the same laptop chassis. Neo 16 with the same config, except CPU.
5% gaming difference in 1k-4K resolutions could point to laptop difference, not CPU difference.
I would expect significantly more difference at 1k as opposed to 4k if the CPU was faster.