Anyway, it is good to see that the gap between the 2 is actually quite small. Shows how much benefit in terms of power savings is realized as a result of a move to 7nm. After all, Zen 2 chips is supposed to be a die shrink from the Zen 1 architecture with some tweaks to improve IPC.
I think Zen 2 is far more than that. It was Zen+ (12nm, found in the 3000 series 2nd gen Ryzen APUs) that was a shrunk and optimized version of Zen 1 (14nm, found in the 2000 series 1st gen APUs).
Cooling and heat mass of laptops will heavily affect results from short intensive tests.
If a laptop CPU has a large effective heatsink (from being connected to a metal chassis, for instance), it can retain high clocks for a couple of minutes. Fan speeds or curves will also affect results. If the test has a limited duration and the system hasn't been pre-heatsoaked, that test can't be a realistic measure of performance under longer loads.
Since we don't know what kind of systems the CPUs were running (no doubt different systems and different size systems), or whether fan speeds or fan noise were normalized (very likely not), these results don't have any other meaning than "depending on the systems and setup, these CPUs can have this kind of relative performance".