When two boats share the same hull type — in this case both the Maxum 3100 SE 2009 and the Maxum 3500 SY 2008 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 — Maxum 3100 SE 2009 at 33,0 ft versus Maxum 3500 SY 2008 at 34,0 ft. Weight tells a clearer story for trailering families: the Maxum 3100 SE 2009 tips the scales at 12 838 lbs — 11 287 lbs more than the Maxum 3500 SY 2008 at 1 551 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 420 hp, the Maxum 3500 SY 2008 has a 45-hp advantage over the Maxum 3100 SE 2009's 375-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Maxum 3100 SE 2009 carries 165 gallons versus 24 gallons in the Maxum 3500 SY 2008. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

Both boats are rated for 10 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.