My Aquadive BS-100 diver uses a "top grade" ETA 2836-2 movement tuned in-house to COSC accuracy and isochronism standards. It is my understanding that the 2836-2 movement is essentially the same as the 2824-2 except for: 1) the additional complication for Day in addition to Date; and 2) the date changes instantly at midnight instead of gradually rolling over during the preceding hour. This watch, however, has only a Date window rather than Day/Date, so the additional complication is not used.
Why would Aquadive use the 2836-2 movement if they don't use the Day/Date complication? Besides the quick date change, are there any other benefits of this movement? Is it considered an upgrade over the 2824-2 in terms of quality or durability?