nice Go Goody... I almost forgot the comparison was sitting out there.
Below are the #'s copied from Allpar. There's not a lot of difference in the interior dimensions between the the Chally and the Charger. It looks like they concentrated on making the front passengers comfortable in the Challenger (that's a good thing... I can barely fit in a Mustang, much less drive one). The 4" in shortening the wheelbase really hammered the rear legroom. There's over 7" of loss. That being said, I don't ride in the back of my Charger but could... in the back of the Challenger? No way. And I wouldn't want to anyway!!
Challenger SRT8/ Charger SRT8
Wheelbase 116”/ 120"
Length 197.7/ 200.1"
Width 75.7/ 74.5"
Height 57.0/ 58.2"
Track 63.1/ 63"
Interior volume 93.9 c.f./ 104 cubic feet (120.2 EPA)
Cargo volume 16.2 c.f./ 16.2 cubic feet (460L)
Front head room 39.5 (1004)/ 38.7 (983)
Front leg room 42.0/ 41.8
Front shoulder room 58.2/ 59.3
Front hip room 54.7/ 56.2
Seat travel 270mm/220mm 10.6 driver, 8.7 passenger
Rear head room 37.4/ 36.2
Rear leg room 32.6/ 40.2
Rear knee clearance 1.2/ 4.5
Rear shoulder room 53.9/ 57.6
Rear hip room 51.4/ 55.5