You're correct the SS/T option adds the suspension, brakes, 215mm (w/ 3.06) diff, 20" wheels that the R/T gets for the mechanicals portion of the option group.
2009 R/T 27J pkg (6 speed MT) ordered 7/17/08, built 10/23/08, home on 11/13/08
Eibach Sportline Suspension
Hotchkis Sway Bars
Nitto 555 Extreme 265/50-18"
392 Cam / DS CMR tune
Hurst /G&K modded short-throw shifter