Engine choice will always be down to planned usage at build stage, a nice economical common rail is good for pottering round the broads but more to cause problems, for sea you can't beat an old school mechanical injected diesel as you can lose all electrical power and they will keep on running, if I was to lose power I would have to lift the floorboards and pull levers to get mine to stop otherwise they would just keep going, as long as they have good oil clean fuel and air, and you can't fix a black box on the go with a set of spanners and a lump hammer.
I know of a broom 450 that went into limp mode crossing the channel on the way back from clogsville due to a fuel pressure issue, it was never enough to cause an engine issue but the computer said no, I would have thought getting the crew home safe was far more important than getting the engines home safe.