So I guess it should work too (same way). anyway, I have to wait one more day, because I downgraded another console 6 days ago.Yes it is safe, as long as you make sure you are in emuNAND when you update
Weird, I was always told that you need to use 11.0 payloads on 11.0, which is what I did with freakyhax when I downgraded my 11.0 New Galaxy Style N3DS.