That seems to be correct. There was a Dr. Z contest of some sort where they were giving away three different new models, each valued around $30,000. https://dodgechallenger.com/forums/m_5315/tm.htm

I guess I can only dream that they would do the trim levels the way you suggested bored out. They make the most sense. This SRT badging in my bias opinion should be used only for forced air induction cars. The SRT-4 was a turboed Neon and now a turboed Caliber. The SRT-6 is a supercharged Crossfire. The SRT-8 and SRT-10 should feature forced air induction and have R/T take over the SRT roles in those vehicles.