They're about equal, MacOS generally is better about letting my copy a thing in one application and paste the whole object in another. Windows however has RDP, which I've used as a file transfer mechanism by base64 encoding files, I thought about writing software that would use it as a half duplex communications channel.
Mac also has something that lets you copy/paste clipboard across machines (including between iOS and MacOS), but I don't know how it works technically and haven't actually used it myself.
