I think "dinghy towing" is a generic term for whatever vehicle or method one uses to drag a car or truck behind their motorhome.
Within dinghy towing you would then have dolly towing, four down towing or trailer towing.
We chose a 2015 Jeep Wrangler Unlimited for the ease of connecting/disconnecting and easy DIY installation of lights and supplemental brakes. It was a great choice and after a 3,000 mile trip I was glad we chose the Jeep. One caveat however is that the Jeep is not very comfortable for long drives. After 7 hours of stop and go driving around Prince Edward Island one day, I was ready for the sofa.
Good luck in your research and in finding the perfect Toad for "you".