What are the differences between RX-RDP, RX-RDP+ and RX420(RDP)?

RX420(RDP), powered by Raspberry Pi 4, provides native dual display and premium performance for customers with Microsoft AVD, RDS, VERDE VDI & Remote Access or vSpace Pro deployments, and with integrated local Chromium browser support. RX420(RDP) comes with integrated dual-band 2.4/5GHz Wi-Fi and Gigabit Ethernet.

RX-RDP+ thin clients is built on the Raspberry Pi 3+ platform providing great performance and value based on a single display for customers with Microsoft AVD, RDS, VERDE VDI & Remote Access, and vSpace Pro deployments. RX-RDP+ comes with integrated dual-band 2.4/5GHz Wi-Fi and Gigabit Ethernet.

RX-RDP, powered by Raspberry Pi3, provides single display and delivers the perfect balance of functionality for customers with Microsoft RDS or VERDE VDI deployments.  RX-RDP comes with integrated 2.4 Wi-Fi and 10/100 Ethernet. RX-RDP can be extended to dual display via a separate SDA dongle.