The build quality looks at first glance from comparable.
Material differences (if any) would not until after prolonged storage under adverse conditions (eg moisture) show (start of contact surfaces). And who knows what would adapter then underperform ;-)
The battery lock when inserted into the adapter which avoids a bothersome slide around!
Super way to operate devices in which the manufacturer has not yet strapped that the use of AA batteries (smaller space, less weight with good capacity today, even if the capacity is not comparable with the type larger batteries) is sufficient !! !
In my view -> Buy recommendation !!!