The Lumia runs Windows........it looks nothing like an iPhone, either physically of the software!
As this has digressed into a Mac vs Windows thread (yeah, thanks for that
@McBain ) lets get it back on track.
For all my reservations with upgrading an existing Windows installation to 10, since I have done it with my laptop (which came with 8.1, but before I did anything I upgraded to 10) it has actually been fantastic! The minor annoyances of Windows Firewall turning itself back on only really give me problems when I am upgrading firmware and using FTP server software (the firewall blocks port 21 for those who don't know, is the port that FTP traffic uses).
I have had a couple of 'BSODs' but that was from running a very, very old flash tool that forces me to use a serial-to-usb adapter. Otherwise it has been rock solid for me. On the other side of the office however (the guy who updated his year old laptop) it has been nothing but trouble for him.
To reiterate my earlier stance, fresh install, go for it. Windows 10 is really, really great! If you are upgrading an older machine, I would stick with 7/8/8.1 for now.