PingFu UDP incorporates the full functionality of PingFu Iris, while adding the ability to tunnel applications that use the UDP protocol to communicate. It hence allows you to tunnel demanding applications like Final Fantasy XI, EverQuest II, and VoIP programs like TeamSpeak, while maintaining high performance.
PingFu Iris is exclusively for applications that use the TCP protocol to communicate.
PingFu UDP is priced higher because of the additional application that it supports and the complexity that UDP tunneling demands.