Challenger SRT Hellcat
They had both the SRT 392 and the Scat Pack starting in 2015. I think they got rid of the SRT 392 in 2017.In my interpretation the 1320's and 392's are all Scatt Packs so the 2015 SRT 392 is a Scatt Pack even though they didn't call it that until 2016 when it became a full trim of it's own. As I see it there are the V6's, R/T's, Scatt Packs, and Hellcats. I would consider the SRT8 a precursor to the current Scatt Packs.
The SRT was a premium car like the Hellcat but with the 392 engine.
Scat Pack had the drive train but more of the R/T 5.7 interior etc. For some reason I think the brakes were different too.