Benchmark comparison:
https://www.techspot.com/review/1042-windows-10-vs-windows-8-vs-windows-7/
Now go out and buy that new computer with W10, you know you want it.
I'm surprised with the "benchmarks" they chose -- why not from cold boot to Firefox open? There is a human component in there, sure -- but that can be gotten around easily. But the breadth of hook-ups and communications hand-shaking that goes on from start to finish will be so different between the three OSs! (And then, let's throw a little Linux action in there! Whoa!)
Anyway, "disappointed" in that, and surprised. A great opportunity, short-changed.