Sooo many options now.... the newer interface cable is USB, the Pro version comes with a standalone data-logger that can record hours and hours of different I/O with customizable logs based on different PIDs, normal sensor stuff, etc... The Enhanced I/O version comes with an input to log your wideband and any other analog device not controlled by the PCM (so it couldn't normally be logged)... The new version has real time tuning for dyno-common functions like fuel and spark tables... The multi-bar OS's are for boosted applications.

I honestly am not sure what it takes for my jump to that platform...