Looks like it's about 10 bucks per person per day more on a usvi charter plus hassle of clearing in/out of bvi . There is no ferry ride needed in the usvi..but if goal of cruising in the bvi..you spend a day going out and a day coming back. There will be people promoting both venues..many with a dog in the hunt. I did both before putting a boat in charter in the bvi. We no longer have a boat in charter . Could care less where one starts from. Take owner's claims for what they are. See what works best for you .