Both adapters do not currently have firmware update (currently 2.0.0) is available.
The AVM adapters no additional software is required, password, and updates can be on the Fritz! OS GUI set / install. The devolo adapters 1100+ This is only possible via software "cockpit".
The AVM adapter reported a slightly higher possible data transfer rate of 220 Mbit / s, the devolo adapter show here (FB 7490) 170 Mbit / s. However, the devolo adapter significantly more reliable in terms of the network connection.