Weight and real world battery life would be two things. Almost certainly build quality. The screen almost certainly isn't as nice. Even if the overall 'macro' bench marks are the same, it almost certainly won't beat the Macbook in day to day 'micro benchmarks' I care about like time to open a new terminal, time to run npm install, time to wake when I open the lid, time from login to watching Netflix, time to search the hard drive for file etc. etc. If I need 'real' performance I'll use a chunky Ryzen/Threadripper desktop computer running Linux over any laptop on the market.

Also I just don't trust Windows laptops to go to sleep properly when I shut the lid. With both high end Dell and Lenovo laptops I've on more than one occasion pulled out a scorching hot laptop with a dead battery out of my bag. Never had a Mac do that. It may be a small thing, but I'm willing to pay a pretty decent premium to never have that happen again.

Plus there's the fact that something almost certainly won't just work if I try to install a *nix based operating system on it.

edit: Oh yea another big one, with the Mac I get a trackpad good enough that I don't feel the need to carry a mouse.