I absolutely ignore tests like Speedometer. I prefer to go by how a browser feels - particularly the scrolling. I would rather use a browser 50% slower if it scrolls like butter than one like Safari which stutters each time I scroll. Safari is the worst M1 browser for scrolling. Firefox is better, but still stutters as I scroll busy pages. Chrome was great - until Edge came along. Edge is the best of the lot. Fast and much smoother than any of the others. I have a Mac Mini and an Apple Magic Mouse 2. I'm sure the experience with a trackpad is inherently better anyway. It's interesting that on a 2012 Mac Mini running Catalina I can easily achieve the most sublime smoothness with Firefox by adding a crafted user.js file to the profile directory., but on the M1 the same user.js file makes no difference at all. There are many posts online about the scrolling issue and some believe it is to do with Big Sur, rather than anything to do with the M1 architecture.