Phoronix recently had one of the best processor reviews I've seen in a good while, mainly because it includes power draw plots for a lot of the benchmarks. The review compares Intel's Core Ultra 7 155H with the Ryzen 7840U (Acer 14" Swift Go 14 for the Core Ultra, Framework 13 for Ryzen). The 155H is nearly identical to the 165H (4% higher max boost clock on the P cores, 2% higher max freq on the graphics), so the results should transfer very well to the 165H.
The 155H and 165H are Intel's most direct competitors to both the 7840U and 7840HS (and thus 8840U and 8840HS). Power consumption and cooling solution matters a great deal, especially when it comes to mobile benchmarks, so including power plots is a very nice detail that most reviews sadly do not offer.
This is Phoronix, so the benchmarks are run under Linux and cover a wide range of workloads, so if you know what type of workload you are running, the overall scores don't matter and you can check your specific workload type in the 370 benchmarks.
The results show quite a different picture than what Geekbench would have you believe. The 7840U wins about 80% of the benchmarks with a nearly 30% higher geomean. The Ryzen also uses significantly less energy in delivering that performance.
www.phoronix.com