How is Moz Page Authority different from Moz Domain Authority?

Both Moz Page Authority and Domain are a reflection of the influence of links. Both consider MozRank, MozTrust and other factors to create a final value. This score is between 0 and 100, on an exponential scale. The only difference is that Page Authority is used on a page-by-page basis while Domain Authority measures the same factors, for the website as a whole.