@tom-capper
Thank you. Yes, I should be more clear. I am calling it page rank, when I am actually referring to Moz's domain authority and Moz's keyword ranking. Still, I believe you answered my question. Under page optimization, I can see what appear to be duplicate listings of my pages along with different SERP ranking. It was confusing until I realized that one was the www and the other was non-www. I have since added code to my .htaccess file that will send everything to www. Can I expect the page optimization section to now only show www versions of the pages? Also, can I expect page authority to increase because it is no longer a mish-mash and is all headed to the same domain and same pages (i.e. www version)?

My page rank for www and non-www is the same. In one keyword instance, my www version performs SO much better.

Wanting to consolidate to one or the other. My question is as to whether all these issues would ultimately resolve to my chosen consolidated domain (i.e. www or non-www) regardless of which one I choose. OR, would it be smart to choose the one where I am already ranking high for this significant keyword phrase?

Thank you in advance for your help.