My "research" on this topic is as non-exhaustive as it could be
but I seem to know a number of twin pilots who have had a staggering incidence of engine failures, yet I know very few SE pilots who have had an engine failure.
One twin (Aztec) pilot I know of has had some huge # of engine failures (10?).
On the Thielers, all bets are off anyway but that is a known problem.
I wonder if twins are more likely (I mean much more than 2x more likely) to get an engine failure? Is there more vibration on the engine and accessories? Or are the engines driven harder, due to the typical operational profile? The control cables are certainly longer.