When two boats share the same hull type — in this case both the Jetcraft 1975 Fastwater 2010 and the Jetcraft 2175 Extreme Shallow 2009 are modified vee designs with aluminum 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?
Size is the most obvious dividing line here. The Jetcraft 1975 Fastwater 2010 measures 20,3 feet overall (2010), giving it roughly 18,3 additional feet of deck space compared to the Jetcraft 2175 Extreme Shallow 2009 at 2,0 feet (2009). Weight tells a clearer story for trailering families: the Jetcraft 1975 Fastwater 2010 tips the scales at 3 259 lbs — 3 237 lbs more than the Jetcraft 2175 Extreme Shallow 2009 at 22 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.
Both boats are rated for 6 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: The Jetcraft 1975 Fastwater 2010 at 20,3 ft is the right call if deck space, comfort, and entertaining are top of your list. The Jetcraft 2175 Extreme Shallow 2009 at 2,0 ft wins on trailering ease, likely lower purchase price, and simpler docking — a solid choice for a buyer who wants more boat for less money.