How is MozRank different from Moz Page Authority?

MozRank is based on an exponential scale between 0 to 10 and is calculated based on the number and quality of the  pages linking to them. It can be applied to a page, or an entire domain.

Moz Page Authority is based on an exponential scale of 0 to 100 and is calculated using MozRank, MozTrust, and dozens of other factors. In this case, it can only be applied to a particular web page.