When two boats share the same hull type — in this case both the ProKat 3660 BlueWater 2008 and the ProKat 3660 Sport Fish 2007 are catamaran designs with fiberglass construction — the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?
On paper these two are close siblings in the size department — ProKat 3660 BlueWater 2008 at 37,0 ft versus ProKat 3660 Sport Fish 2007 at 37,0 ft. Weight tells a clearer story for trailering families: the ProKat 3660 Sport Fish 2007 tips the scales at 148 lbs — 135 lbs less than the ProKat 3660 BlueWater 2008 at 13 lbs. That difference is meaningful if you're working within a half-ton or three-quarter-ton truck's tow rating, especially once you factor in a motor, gear, and fuel.
The power gap is worth calling out. Rated to 700 hp, the ProKat 3660 BlueWater 2008 has a 50-hp advantage over the ProKat 3660 Sport Fish 2007's 650-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Both carry nearly identical fuel loads — 4 gal and 3 gal — so range won't be a tiebreaker here.
Both boats are rated for 11 passengers — a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.
Bottom line: Performance buyers should lean toward the ProKat 3660 BlueWater 2008 and its 700-hp ceiling. If fuel economy and quieter running matter more than top-end speed, the ProKat 3660 Sport Fish 2007 with its 650-hp rating is the more economical daily driver.