Actually those numbers are sizes, not stifness chart. a 1080 is like 75 and a pro model is like 90.
It pisses me off every time I see such a thread come up, 1080 and pro model are two totally different boots. As its been said, pro model is like the Course, and the 1080 is like the X-wave 6, so basically, a cheap ass boot.
The idea behind the 1080 is a version that looks like the ones the riders are on(pro model) that is not expensive so people can buy it a lot..in fact its a cheap as hell boot, and low end one.