backup 8.1 -> 10

[Beppe Gissi]

I'm on WP 8.1 and I'm going to install the RTM build. I only have one doubt. I've just backup my phone, and now in going to hit the "install" button.

When I'll be on W10M, I'm going to do an hard reset to fresh up my phone. Then I'll restore the backup.

Does 8.1 backup work on 10, or should I backup when I'll be on 10 and then reset?