Yup. You are right, that is the difference. Agree with the others that the MSRP listed was NOT for the T-types though. GN/GNX. No way in HELL I would pay that much!!
Well shoot then you oughta just print it up, sell your car for half that and use that as you ammo....maybe that's how that one guy got his ammo by trying to sell a Regal T at a 38k starting price (reserve not met) on eBay...
That is for the GNX. Ive watched the NADA guide for the last 20 years and they were very low in the 90's and now they are too high imo. Only about 2% of the TR's around fall into the high retail category.