Thanks for all the results, interesting, and confirms thoughts that most people had.
What I see from it
Apple (with and Apple chip) is generally faster than anything Intel (including Apples with Intel chips)
Graphics cards are a major contributing factor
Combined single GPU figures are the best result to judge/compare editing speeds
Single core speeds are the most significant processor figure, multi core speeds less so.
An i9 is not faster than an i5 just because it is an i9
On my old laptop, the main time I felt the lack of speed was when merging/stacking, it was taking 96 seconds for a five image merge!
I would have been happy if the new machine came in under 30 seconds, it actually does it in 19.5 seconds
The total file size of the five images is 26MB, and I time from clicking OK on this screen
To the time the options (natural/detailed) on the left here appear
My “guesstimate” of how long other machines (the ones people posted results for) would take on the same testing
Of course those could be way out
Which machine is best?
If you want the very best editing experience, then it’s Mac
If you want six times the storage, more memory and still a very good editing experience at half the price, then it’s PC (with careful choice of components)
I think the main point would be that most fairly recent machines with a half decent graphics card will be comfortable for the average non-professional user, and it goes up from there
The only reason IIRC to get the CPU with the onboard GPU was a a backstop in case I had any GPU issues 
