Conbee II vs zig-a-zig-ah (zzh)

Hi,
Did anyone make proper testing which adapter is more stable and more performant? I have 2 CC2531 from different suppliers and either of them fail from time to time into timeouts. Removing a stick from the USB and putting it back helps for several days but then this problem occurs again. So I’m looking for options for upgrade. Conbee seems to be generally better supported than zzh in terms of people involved and their activity in github and other places but it doesn’t say anything about stick quality itself. Also, I have to desire in using deconz because I switched from it to zigbee2mqtt and find it better organized and designed. So even if I get Conbee stick I’m intended to use it with z2m.

Thanks!