Like Don Anton, I too don't feel I have enough knowledge of the real life mafia and John Gotti to give a fair answer. I actually know Sonny's personality better.

That being the case,if I had to choose, I'd go with my friend Turnbull (cause he knows everything) and say Sonny would be the better Don.

"Mankind must put an end to war before war puts an end to mankind. War will exist until that distant day when the conscientious objector enjoys the same reputation and prestige that the warrior does today." JFK

"War is over, if you want it" - John Lennon