I haven't heard any other H1's except these. I did listen to some new IV's recently and they sounded phenomenal. I own/owned RP-160M's, KG4's, Quartets, H1's and a set of CF1's.
I didn't like the CF1's and sold them pretty quickly without trying to do anything to improve them. I still own all the others. All of the others sound good to very good except the H1's are off kilter. Someone on one of the FB Groups said that the gaskets were a problem on theirs, so I have a set on order.
I've had them on three different receivers. Pioneer SX-650, Realistic STA-2300 and Sony DA3ES.