I can tell you that the PD-5WS-DV is a wireless on/off switch that uses Lutron's Clear Connect RF technology, while the PD-5ANS-WH-A and PD-5ANS-WH-R are both wired switches that use Lutron's proprietary Maestro technology. Additionally, the PD-5ANS-WH-A and PD-5ANS-WH-R are both designed to be used with Lutron's Maestro Wireless system, which is different from the Clear Connect RF system used by the PD-5WS-DV.