its the same software just now available on a separate map. I tested it when I got it,where I live there is a very narrow lane with a bridge on it that the car will route me along but when the caravan unit is selected it routes around it, I have only had it since January and have used it to go to Weymouth without any problems, didn't try the car route to see if it was any different, where off to Dawlish in a couple of weeks, last time we went our old satnav took us down a very narrow lane were we meet a double decker bus coming the other way.
When towing..no, always double check with the map. Solo around cornwall...yes, punching in a remote beach location and letting it take you on a mystery tour is brilliant!