Which is to say that neither Windows nor Mac shortcuts are inherently better. It's just what we're used to. IME, the main difference is that once you learn the Mac shortcuts in a handful of apps, they'll pretty much work on the other apps you encounter, too.
It's not like you can't change it.
System Settings > Keyboard Shortcuts > App Shortcuts > add your browser > remap the Reload menu item to F5
Along with Karabiner you can pretty much make Mac OS work however you want it to when it comes to keyboard shortcuts.