One and only difference is the sensor. It is an updated design with different electrical characteristics than the '05-06 models. It has a smaller footprint. The ECM is also pinned slightly different because of this and the fact that all 2007-up cars are Federally mandated to be 100% CAN compliant. The '05-06 are hybrids as they are OBDII modules with CAN capabilities. That is why the OBD gauges like the Greddy Intelligent Informeter, the MSD Dashhawk, and the Blitz R-Vit don't work; pins #6/#14 aren't populated.
.......My Dashhawk works great in my Son's RS3.0
