I am building a 92 feet motor yacht in the Maldives and I am looking both MAN and MTU engines for it. I have already been told that 10V is not as smooth as a 12V, which was the information given to me by MAN engineers. If so, is there any difference between 8V and 12V in terms of its running (smoothness)? I would appreciate any opinions, advice and experience in this matter and thank you in advance. Samih.