I certainly like dreaming about a TC for our older 4x4 pickup. Resale is pretty high on those Arctic Fox units and they don't have a motor attached!
Cab over beds are usually queen sized but not king as some TC's might be--although most have cabinets on the sides and smaller queen sized beds about the same as a C. TC's tend to have dinettes that fold into beds but dinettes in both types are always shorter than a full size bed. I haven't see many models with fold out type of beds. We can connect our jack knife couch and the dinette bed and sleep a crew of kids and their parents while still getting to the cabover for the grandparents.
We have camped mostly off road in AZ where the roads are dirt and relatively passable, but in Colorado we couldn't get into some of the narrow rough canyons where camping is allowed. We have more exploring to do in the Colorado federal forests.
Here are the specs on our 22e and the larger 24 ft. models from 2003.

May not compare to today's models. If you don't like 27 gal fresh water you won't like 30 plus the 6 in the water heater. We seldom run out in a week but we don't do much in the way of showering.
4x4 class C's are very rare and very expensive. Gary Haupt had his c converted for $15,000 or so. I just saw one for sale in Flagstaff for $49,000 about the size and age of ours. Surely someone prefers a Class C 4x4 to a TC if they can price it that high.
I have seen 4x4 Lazy Daze for sale too, and of course you can get the Tiger vehicles
Tiger RV site if money is no object. So a TC and 4x4 truck seems more maneuverable than a C for sure and if that is the way you want to camp, seems that you can find a TC with specs that match or exceed a C.
Have Fun!