When two boats share the same hull type — in this case both the Scout 175 Sportfish 2012 and the Scout 191 Bay Scout 2012 are modified vee 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 — Scout 175 Sportfish 2012 at 17,4 ft versus Scout 191 Bay Scout 2012 at 18,8 ft. Weight tells a clearer story for trailering families: the Scout 175 Sportfish 2012 tips the scales at 126 lbs — 113 lbs more than the Scout 191 Bay Scout 2012 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 150 hp, the Scout 191 Bay Scout 2012 has a 35-hp advantage over the Scout 175 Sportfish 2012's 115-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Scout 191 Bay Scout 2012 carries 42 gallons versus 32 gallons in the Scout 175 Sportfish 2012. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
Both boats are rated for 5 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 Scout 191 Bay Scout 2012 and its 150-hp ceiling. If fuel economy and quieter running matter more than top-end speed, the Scout 175 Sportfish 2012 with its 115-hp rating is the more economical daily driver.