Although I don't disagree, the difference was that Microsoft had a monopoly on computing. Not just on PC but take computing as a whole and microsoft was hugely dominant. From a legal standpoint there is a huge difference.
It wasn't until the end of the 90s when macs started making an impression on peoples desktops, with the imac, but oddly enough if https://en.wikipedia.org/wiki/Usage_share_of_desktop_operati... is to be believed, windows still has a 95% share of the desktop/laptop market.