I bought this cutter as I thought it would be quicker and more compact than my 30 year old 15mm copex pipe cutter.
I tested them both on the same bit of old copper pipe and found my copex cutter went through the pipe faster and with less turns, I did 5 cuts each and the copex was the clear winner on every cut.
The OX is slimmer but has a greater diameter so it will be more difficult to get into tighter places with the OX.
I'm sticking with my original cutter (pic attached) and the OX will be my spare.
Its a shame that manufactures don't put the the overall measurement's of these cutters with the details as I think I would have chosen something else.