When two boats share the same hull type — in this case both the Harris Flotebote Grand Mariner 250 SEL 2009 and the Harris Flotebote Royal Heritage 270 2009 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?
On paper these two are close siblings in the size department — Harris Flotebote Grand Mariner 250 SEL 2009 at 27,0 ft versus Harris Flotebote Royal Heritage 270 2009 at 28,0 ft. Weight tells a clearer story for trailering families: the Harris Flotebote Grand Mariner 250 SEL 2009 tips the scales at 461 lbs — 122 lbs more than the Harris Flotebote Royal Heritage 270 2009 at 339 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 260 hp, the Harris Flotebote Grand Mariner 250 SEL 2009 has a 85-hp advantage over the Harris Flotebote Royal Heritage 270 2009's 175-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load.
For family outings this is probably the sharpest distinction between the two. The Harris Flotebote Royal Heritage 270 2009 is rated for 17 passengers, while the Harris Flotebote Grand Mariner 250 SEL 2009 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 Royal Heritage 270 2009 could be the deciding factor.
Bottom line: Choose the Harris Flotebote Royal Heritage 270 2009 if your priority is putting more people on the water — it handles 17 passengers and at 28,0 ft it has the deck room to back that rating up comfortably. The Harris Flotebote Grand Mariner 250 SEL 2009 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 16 that costs less to run day-to-day.