Technically, it’s quite similar to RFXCom. There are differences in the supported devices though. The list of supported brands/devices is yet very very long. And: The dev team is absolutely willing to support new/unsupported devices which RFXCom was not (at least in my case)
The dev team is also willing to support other home automation projects (OpenHAB?) than it supports already.
Like RFXCom, RFLink writes received decoded 433MHz packets to usb-serial or sends serial writes to 433MHz. Probably RFXCom binding can be made compatible/aware of the strings RFLink is sending/receiving via serial?