I would concur. Engines aside, the boat systems are identical, as are maintenance costs. One possible exception would be the inclusion of two heads on ex-charter cats. But then again, this feature provides for very happy admirals, so it's a trade
You would be correct when it comes to engine
maintenance, but not necessarily engine repairs
, Both engines won't 'break' at the same time. In fact, engine redundancy is one of the benefits of catamaran ownership
. With twin engines...of course.