I no longer have H6, so I can't do direct comparison. However, no matter how much I wanted to like Beoplay H7, I'm bringing them back to Bang & Olufsen store. Audio keeps clipping when I turn my head to look to the sides before crossing roads and to me it's not acceptable. Also, H7 is still lacking too much in treble sparkle and mid range.
Finally, software wise H7 seem like unfinished product so far. Whereas it's effortless to switch source of which B&W P5 Wireless is playing, e.g. from iPhone to Macbook Pro, or from Macbook Pro to Apple Watch, when I try to switch sources for H7 I need to restart headphones or manually disconnect from source in order to be able to start listening from an another source.
However, for someone looking for wireless headphones with good bass and better than average comfort, H7 is definitely worth a shot. I feel like H7 could be best compared to V-Moda's new wireless headphones, which I haven't heard myself though.