The AWD version (both C & S) has a smaller resonator to allow room for the rear drive shaft, so it's exhaust has a bit more burble than the front wheel drive models. Otherwise the exhaust system for the FWD C is the same as for the limited and should sound the same.
Welcome to the forums. Chrysler offers 2 different muffler part numbers. Mopar 68143187AG and Mopar 68109932AE. I agree with Pennhaven that it is a difference in FWD vs AWD.
A Limited and a 'C' should be quieter than an 'S' anyway. IMO.
my 2015 200c FWD 3.6 is only really loud/alot of drone between 2-3k rpm. i found the S i test drove to be a little louder but not as deep toned. only true difference is awd and fwd, seats, interior options, suspension. i added a front sway bar under the hood and feels just like the S now.