Haven't looked into the former, but Ron & Bones seem to be very large (too large to mesh with my other 25-28mm minis). One review mentioned that the smallest model they had measured 30mm and the largest 52mm. They look great though.
I shall recommend Pirates! by Flagship Games. It uses ordinary 25-30mm figures and there are excellent resin-cast ships available. If cost is an issue, ships can be readily made from cardboard, and the game does not suffer a bit!