What may be lost in this discussion, is what is the objective of the side mirrors (or mirror camera systems). As I read it, it is to see parallel to the side tangent of the car/truck. It does not care about the blind triangle created by the vehicle. Here is a good quote from the regulation...
I started out with preordering the Single. But switched to the dual recently. Reason? I have heard that with dual the 2 motors are slightly different sized, So sometimes you are using both motors. But at others you can use just one. With the different sized motors, you can use the smaller at...