Well, completely rebooting is a lot slower on my Macs than on my Linux.

But I'm running a fairly slim Archlinux install without a desktop environment or anything like that. (It's just XMonad as a window manager.)

What hardware? Up until a recent BIOS update my X870 board 9950X3D spent 3 minutes of a cold boot training the RAM… then booting up the OS in 4-8 seconds, so my Mac would always win these comparisons. Now it still takes a while at first boot, but subsequent reboots are snappy.