When two boats share the same hull type — in this case both the Glacier Bay 278 Cuddy - Hardtop 2009 and the Glacier Bay 3480 Cuddy - Hardtop 2010 are catamaran 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?

The power gap is worth calling out. Rated to 600 hp, the Glacier Bay 3480 Cuddy - Hardtop 2010 has a 300-hp advantage over the Glacier Bay 278 Cuddy - Hardtop 2009'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 Glacier Bay 278 Cuddy - Hardtop 2009 carries 18 gallons versus 3 gallons in the Glacier Bay 3480 Cuddy - Hardtop 2010. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

Both boats are rated for 12 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.