How is Moz Page Authority different from Majestic Citation Flow?

Moz Page Authority is Moz’s attempt to score how well a given URL or a particular page of a website will rank. Majestic Citation Flow is a score which predicts how influential a URL might be based on how many sites link to it. Citation Flow can be calculated page wise as well as domain wise, where Page Authority can be calculated by only web page.

If these metrics are so similar, why are they different for almost every page? Because each:

• Uses their own, proprietary algorithm…
• Based on their own pool of data…
• and use a different scale (linear vs. exponential).