Either way, you are towing something. You have the convenience of moving around while in transit in the "C", but your overall space is going to be smaller compared to the same length in a trailer. However, in a trailer you are limited to the inside of the tow vehicle, so not as convenient for passengers for bathroom visits or to grab a bag of potato chips.
Trailer will afford more living space once you "get there". The "C" will give you better mobility while traveling.
Considering the cost of insurances and vehicle regestrations, mechanical maintenance, and all that.... with the "C" you have 2 vehicles to maintain, 2 engines with oil changes, 2 engines for fuel fill ups, 2 engines for full insurances.
With the trailer, you have only 1 engine, 2 license plate registrations, and overall insurance will be less. Something to think about?
Personally, we own a travel trailer. We had (and still have) options for switching to a 5er, a Motor Home, an, A, B, or C. For our lifestyle, the travel trailer fits our lifestyle. Yours may be different. Jumping in without any previous experience may work OK for you, but then, you may end up hating your choice (which ever it is). Most of us "grow" into our chosen RV lifestyle, beginning with Tent Camping, Pop-Ups, and navigating through various RV styles. Many of us are no longer on our VERY first RV for LOTS of reasons, when the first choice did not work out.
In your situation, you would be best to rent one of each and try a couple week-long trips. Then you'll have a better comparison before you invest a few thousand dollars into something you may not like at all.