SRT you get the adjustable suspension and a couple more small bells and whistles, with a 3 year 60000 km warranty. Scat Pack is a lot less money, same power train, but you get a 5year 100000 km warranty, because it is still considered an RT. I know this because I asked which warranty my Scat Pack would have, and my dealer had to get in touch with the district rep, and that was the answer they came back with.