I always consider light twins slightly more dangerous than a single, particularly with a non current pilot.
I think this mainly relates to the first 15 seconds of the flight, which are usually over land. There is no doubt that an engine failure in the cruise in a twin verges on a non-event.
Timothy, I hope your 20% is down to the number of flights rather than number of ditchings!
Well spotted! Yes, 5 flights, one ditching. I was just using it as an example of how to lie (or mislead) with statistics.
Timothy