Both the Mainship 34 Trawler Hardtop 2009 and the Mainship Expedition 2010 are semi-displacement designs, both built in fibreglass, so 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 Mainship Expedition 2010 measures 38,3 feet overall (2010), giving it roughly 4,3 additional feet of deck space compared to the Mainship 34 Trawler Hardtop 2009 at 34,0 feet (2009). Weight tells a clearer story for trailering families: the Mainship Expedition 2010 tips the scales at 24 000 lbs - 5 000 lbs less than the Mainship 34 Trawler Hardtop 2009 at 19 000 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 380 hp, the Mainship Expedition 2010 has a 140-hp advantage over the Mainship 34 Trawler Hardtop 2009's 240-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Mainship Expedition 2010 carries 300 gallons versus 250 gallons in the Mainship 34 Trawler Hardtop 2009. 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 Mainship Expedition 2010 is rated for 11 passengers, while the Mainship 34 Trawler Hardtop 2009 caps at 10. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Mainship Expedition 2010 could be the deciding factor.