Anecdotally:

* Windows's reboot nag screen is way more insistent and naggy, OSX just has a notification in a corner going "there are updates available", Windows has a big dialog front and center, which comes back frequently

* Windows updates requiring reboots are significantly more frequent than OSX's

* Windows will eventually refuse to put things off and reboot on its own, IME OSX won't

* The Windows update process takes ages, and there's literally nothing you can do with the machine during it

Having both Windows ans OSX personal machines, updates to the Windows one annoy me much more than OSX's. Though to be fair the W10 experience is still a significant improvement over the XP and W7 days (I haven't had an update repeatedly fail yet).