Totally agree, it’s two different tests and use cases. Most people will run it how it comes out of the box and that’s probably more representative of the real world.
I just think it’s not entirely fair to say “windows is 20% slower” when we have no idea which trash HP loaded it up with. If I managed an IT Dept and learned my $$$$ hardware lost 1/5 of it’s performance I’d certainly be pushing HP for solutions. Or maybe they’d prefer to take 20% off the price?