Neither the Lynx dongle nor the RPM dongle fully emulates the Enttec Pro, They all work as far as Vixen is concerned, but there's some functionality that has been omitted. The RPM one, for example, only sends full universes and ignores all other message types, and the Lynx one does not respond to the "what is your serial number" query, and of course, neither use Enttec's VID/PID, so there's a chance that they won't work with third-party software.
/mike