Anyone who wants to geek out on these two measurements should go to Pierre Aubert's collection of Spinorama measurements. It's an incomplete list, but you see a pattern on whom takes their R&D seriously, and the fact that good measurements are unicorns in a sea of mediocrity.

https://pierreaubert.github.io/spinorama/index.html

Author of "Status 101: How To Keep Up In A World That Keeps Score While Buying Into Buying Less"