The AH-D9200 has a more involving sound than the Vérité Closed, IMO, thanks to a treble section that is brighter, clearer, and more engaging. The ZMF flagship has a better midrange, though - it is teeming with luscious detail. Both headphones have truly excellent bass presentations; the Vérité Closed has a touch heavier mid-bass presence, but both are maestros at layering, separation and texture in the lower registers.
I have never heard the Hiby R8, so I can't recommend a DAP pairing.
With that being said, based on the innate abilities of either headphone, you should pick an option that excels in a genre that you listen to. For EDM, the Denon is the (slightly) better fit; however, I'd gravitate toward the Vérité Closed for vocal-oriented genres, thanks in large part to its immaculate ability at producing voices that are distinctly emotive and potent. Both are within touching distance of each other, so you are trading a few points across the board when you switch between the 2. Suffice it to say, if you own both, you're well set; if you own only 1 of them, it's no loss - you've got one of the best headphones around.