Quick note, I have never solved either of these puzzles.Current UWR takes longer to solve a master pyraminx than a kilominx/kibiminx. Also, it is good to see developments on solving methods.
But I feel the master pyraminx looks harder than the kilominx. Just my thoughts, from literally just looking at both these puzzles. Just thinking, a 4x4 version of a pyraminx would be harder than a 2x2 version on a megamix.