There are more similarities.
When you click on the logo in the lower left corner, it brings up a menu of available programs. If you launch one, it will cause an entry to appear on the taskbar with an image and text indicating what it is. Furthermore, in the selection of software, there are programs with amazingly similar purposes, like accessing the Internet, sending mail, exploring the files on the hard drive and more.
I bet if we dig deep enough, we will probably find that both operating systems were designed to do pretty much the same work.
And the coup de grâce, of course, is the background image. It is from Norway, and in the "Drittes Reich" the Scandinavians were the models of the "Aryan race".
Now, the bidding is open on my beautiful tract of beachfront property in Arizona. Going once..