When two boats share the same hull type — in this case both the Harris Flotebote Grand Mariner 240 2010 and the Harris Flotebote Grand Mariner SEL 250 2012 are pontoon designs with aluminum 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 Harris Flotebote Grand Mariner SEL 250 2012 measures 27,3 feet overall (2012), giving it roughly 3,3 additional feet of deck space compared to the Harris Flotebote Grand Mariner 240 2010 at 24,0 feet (2010). Weight tells a clearer story for trailering families: the Harris Flotebote Grand Mariner SEL 250 2012 tips the scales at 3 537 lbs — 3 534 lbs less than the Harris Flotebote Grand Mariner 240 2010 at 3 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 SEL 250 2012 tops out at 3 hp. Engine specs for the Harris Flotebote Grand Mariner 240 2010 aren't listed — confirm with a dealer before selecting an outboard.Both carry nearly identical fuel loads — 81 gal and 81 gal — so range won't be a tiebreaker here.

For family outings this is probably the sharpest distinction between the two. The Harris Flotebote Grand Mariner SEL 250 2012 is rated for 225 passengers, while the Harris Flotebote Grand Mariner 240 2010 caps at 16. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Harris Flotebote Grand Mariner SEL 250 2012 could be the deciding factor.