Difference?
Most likely just the transmission ECU. The RA T-ECU does not have the programming for Super Sport mode, while the MR one does. In all likelihood they are the same piece of gear with just a different program.
Ah, you are correct. According to the attached, the RA gets slightly higher 5/6 ratios...
http://www.turbomagazine.com/feature...art/index.html
http://www.turbomagazine.com/feature...art/index.html


