 This more complex RL configuration could be considered an exclusive flagship vehicle feature, and not specified for vehicles with lower price points.On the other hand, the later SH-AWD configuration without the Acceleration Device could just be a simpler and less sophisticated version due to vehicle dynamics and price points, or it could represent a more refined, less complex and inherently more reliable, new standard for the SH-AWD configuration.The rationale for the two distinct configurations has not been publicized by Acura.