When two boats share the same hull type — in this case both the Monterey 234SS 2013 and the Monterey 400SY 2013 are deep 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?

Size is the most obvious dividing line here. The Monterey 400SY 2013 measures 41,0 feet overall (2013), giving it roughly 18,0 additional feet of deck space compared to the Monterey 234SS 2013 at 23,0 feet (2013). Weight tells a clearer story for trailering families: the Monterey 234SS 2013 tips the scales at 395 lbs — 373 lbs more than the Monterey 400SY 2013 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.

The power gap is worth calling out. Rated to 435 hp, the Monterey 400SY 2013 has a 135-hp advantage over the Monterey 234SS 2013's 300-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Monterey 234SS 2013 carries 52 gallons versus 33 gallons in the Monterey 400SY 2013. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

The Monterey 234SS 2013 is rated for up to 1 people. Passenger data for the Monterey 400SY 2013 wasn't available.