When two boats share the same hull type — in this case both the SeaArk ProCat 240 2012 and the SeaArk Stealth 172 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 SeaArk ProCat 240 2012 measures 24,0 feet overall (2012), giving it roughly 7,0 additional feet of deck space compared to the SeaArk Stealth 172 2009 at 17,0 feet (2009). Weight tells a clearer story for trailering families: the SeaArk Stealth 172 2009 tips the scales at 925 lbs — 753 lbs less than the SeaArk ProCat 240 2012 at 172 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 225 hp, the SeaArk ProCat 240 2012 has a 125-hp advantage over the SeaArk Stealth 172 2009's 100-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the SeaArk Stealth 172 2009 carries 18 gallons versus 5 gallons in the SeaArk ProCat 240 2012. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

For family outings this is probably the sharpest distinction between the two. The SeaArk ProCat 240 2012 is rated for 7 passengers, while the SeaArk Stealth 172 2009 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the SeaArk ProCat 240 2012 could be the deciding factor.