I think the assumption (or word spread) that CC was patented for its commercial qualities but I don't believe that to be the case. In fact, its just the opposite. It has a soft texture, ripens quickly and has a short shelf life (its sugar content causes it to want to become iverripe and ferment quite quickly).
Ok that makes sense from what I have read over the years on the forum, thanks Rob for that confirmation.
regarding the original question by OP
There are many different mangoes grown all over the world commercially, I mean even Edward is grown commercially. but to be a profitable venture in Florida, the 1st thing you need to know is your market, and what varieties ( superior than the common fare ) That will grow well in this location, and hold up in shipping.
Regarding NDM#4 from what I have read, it has less susceptibility to splitting, from specimens I have seen here in Florida during my visit, almost all that I have seen had black specks on them, the only ones that looked clean were a couple I purchased green.. ( 3 different sources ) They were all extremely sweet. one think NDM has going for it, there seems to be some buzz around this mango among Vegans, which is a potential target market.
Another variety one may consider is Mallika. the fruit I had were pretty clean, but the taste was amazing, I have had them before but, the ones I tried from Truly Tropical, were the best mangoes I have had this year. and these mangoes love to be picked green, making them a good candidate for commercial use.