Coincident Dragon vs Coincident Frankenstein

I have recently switched from a (relatively) low efficiency speaker (Verity Parsifal) to high efficiency (Devore Orangutan O/93).

I absolutely love my Coincident Dragons, but was wondering if maybe I should make a switch to the frankensteins.

Has anyone heard/compared the two in a similar system ? What would I be losing /gaining by the switch. I heard Israel once claimed that the Dragon's had 95% purity of the Frankenstein, if that's really true I might keep the dragons since it probably has better bass.

Thoughts ?