Only way to more accurately test that is:
1. Boot the Linux USB - do the Test - note results
2. Boot back to Windows - do the test - note results
Yes: I fully agree and that it was my plan to do just that but I will not be using Linux any more.
Regarding speed: I did find that overall Linux was about 10% faster than Windows 10 Pro but I am not a Linux user and using it, (along with my tiredness from a week of early morning and daily tests), seems to have created other issues for me. - Partly because I did not fully trust a free Linux download.
Some people seemed to considerred that there was a problem with my Windows 10 Pro laptop/PC, (which to me was running really well and it had been running like a charm since I first installed Windows 10 Pro). That said, I took it onboard that something within my Windows PC was a part of the problem and I started fiddling around with the settings. I have two 1 TB hard disks in the PC and both had the same windows 10 installed on them with the same settings via a clone of the original to the 1TB hard disk. - Everything was good and I had got out of the habit of backing up to my portable 500GB USB drive which I last used over 2 years ago.
To avoid the possibility on a Windows 10 Pro issue on my laptop/PC I installed a brand new copy of Windows 10 Pro on the second, (ie the original/reserve), internal 1TB hard drive that the main 1TB SSD Hard Drive had been cloned from last year and then I was faffing about swapping between the Linux USB and the fresh install of windows 10 which seemed to make little difference and this was in the early hours of the morning and I had been at it for days,
The upshot is that when I seemed to see what I thought were Linux files, (which I don't really know/trust), inside my Main 1TB Hard Disk I deleted them and when these were changed I could not boot into the main 1TB Hard Drive and on foolishly pressing F4/recovery at start up screen it may have change its MBR to Windows 7 so now my main 1TB Hard Disk information is unobtainable and cannot be seen from the other hard drive even though the main hard drive is reported as being available and OK. - (These things happen at 4;00 in the morning when you have been faffing around for days with speed tests, making change to a system that was working well and and using different operating systems).
I was always more comfortable with hardware than software and since I retired, (some years ago), I have not had any PC problems/issues and Windows 10 had been so reliable that I become complacent regarding backups and I had tended to use the original 1TB Hard Disk with had a fresh format and a new install of Windows 10 Pro on it. - I never store anything in the cloud for and I keep everything on my PC. - I have tried recovery software but up to now no luck. - I will ask for support regarding this on another Thinkbroadband Forum.
Regarding Linux: My present view is that Windows 10 pro is a standard operating system and it needs to operate properly with Windows 10 Pro.
The upshot is that I will not be using Linux and there was nothing wrong with original installation of Windows 10 Pro settings or performance as it was working as well as the fully updated fresh install..