The Blister Gear Review praised how the Bibby excelled in powder and the days after powder, and how they did surprisingly well in trees. The in the review of the AK JJ, it noted how the regular JJ had some problems with tip dive, but overall were a very good ski. However I haven't really found many reviews on the JJ that are as in depth as Blister
Some other things that I am considering are that the Bibbys have better base and edges while the JJs are lighter(unsure on this one) and the 1/2 cap construction is a plus. Also I have heard conflicting reviews on Moment's durability.
+k for help