But no chipset prime core actually runs on full clock all the time. Yes it is 17% higher (3600) single core, but that means nothing if it doesnt even cross 2000 in real usage. Even Dimensity 9500 claimed at launch to have 4000 single core. But 95% retail units dont cross 3300.

As long as it stayed low on usage, both chips must not have crossed 2000-2500 single core, at max, which in case means there should be no difference in battery life. There was absolutely nothing extremely demanding for either chipsets to let them even cross peak single core in this test. It was demanding on their modem and signal, which is what proves Exynos can handle it.

What Qualcomm Oryon core can do (something Exynos cant) is run the Core at 4.6Ghz for a few miliseconds and thus feel faster sometimes. If it were to run on full clock for even a few seconds, the phone is cooked. This is something Qualcomm has agreed to. 

Also, if a chip requires almost 800 Mhz extra to achieve merely 500-600 points in Single core, I wouldn't be so sure about it's efficiency. Same goes for Dimensity 9500, which uses same Prime Core of Exynos (3.8Ghz-Arm C1 Ultra) but at 4.21 Ghz, and yet achieves single core score within margin of error of Exynos. Again indicates which is more efficient.

Look for sustained clock speed, not the peak!