Both the Harris Flotebote Grand Mariner 250 SE 2009 and the Harris Flotebote Sunliner 220 2010 are pontoon designs, both built in aluminium, 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 Harris Flotebote Grand Mariner 250 SE 2009 measures 27,0 feet overall (2009), giving it roughly 5,0 additional feet of deck space compared to the Harris Flotebote Sunliner 220 2010 at 22,0 feet (2010). Weight tells a clearer story for trailering families: the Harris Flotebote Grand Mariner 250 SE 2009 tips the scales at 4 459 lbs - 1 859 lbs more than the Harris Flotebote Sunliner 220 2010 at 2 600 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 Harris Flotebote Grand Mariner 250 SE 2009 carries a rated maximum of 260 hp. Engine data for the Harris Flotebote Sunliner 220 2010 wasn't available in our records - check the manufacturer's spec sheet before sizing a motor.

For family outings this is probably the sharpest distinction between the two. The Harris Flotebote Grand Mariner 250 SE 2009 is rated for 16 passengers, while the Harris Flotebote Sunliner 220 2010 caps at 15. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Harris Flotebote Grand Mariner 250 SE 2009 could be the deciding factor.