Avduro	Expedition Pannierz
Body of the bag	same	same
Seat straps	same	same
Volume	same	same
Colour	Charcoal	Charcoal
Rear stiffener	same	same
Pockets per bag	2 per bag, front and rear Rear pocket roll top Front bigger mesh	1 (rear)
Construction	same	same
Side strap and Locking buckle	1 each side, behind pocket at rear of each bag	nil
Base rear strap	same	same
Top stretch bungee net option	yes	no

 

The simple way to think about the choice is

Expedition for Touring on dirt and road.

Avduro for Adventurous riding, where Adventure meets Enduro.

Like all rules there are exceptions, the main one is that Avduro sit better on upright hard box frames because the side straps pull them into the frames.