I don't spend as much critical time listening as I used to - but I do have a fully glued\braced set of KLF-20's with Crites XO and Ti tweets.
Also have had a couple of sets of H2's, also with Crites XO and Ti tweets.
Swapped back'n'forth quite a bit - diff rooms, treatments, amps\pre's.
I liked them both, but they were different. The KLF's are more "full" and certainly can pound out the bass.
The H2's were "clearer" and yes, more "airy" - but lacking that punch for the most part.
And all of the makes sense to me, given the little I know. Sold a nice set of H2's (KP201's), kept one set of not-so-nice (cosmetically) H2 KP201's and of course, keeping the KLF-20's.