Both the Premier Boats Grand Majestic 310 LTD 2008 and the Premier Boats S-Series 250 ES 2009 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 Premier Boats Grand Majestic 310 LTD 2008 measures 31,0 feet overall (2008), giving it roughly 6,0 additional feet of deck space compared to the Premier Boats S-Series 250 ES 2009 at 25,0 feet (2009). At 3 100 lbs and 3 200 lbs respectively, both sit in a similar weight class - either should pair comfortably with most mid-size SUVs and half-ton trucks, though always confirm your specific tow rating with the motor added.
The power gap is worth calling out. Rated to 250 hp, the Premier Boats S-Series 250 ES 2009 has a 50-hp advantage over the Premier Boats Grand Majestic 310 LTD 2008's 200-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Both carry nearly identical fuel loads - 30 gal and 29 gal - so range won't be a tiebreaker here.
For family outings this is probably the sharpest distinction between the two. The Premier Boats Grand Majestic 310 LTD 2008 is rated for 20 passengers, while the Premier Boats S-Series 250 ES 2009 caps at 15. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Premier Boats Grand Majestic 310 LTD 2008 could be the deciding factor.
Bottom line: Choose the Premier Boats Grand Majestic 310 LTD 2008 if your priority is putting more people on the water - it handles 20 passengers and at 31,0 ft it has the deck room to back that rating up comfortably. The Premier Boats S-Series 250 ES 2009 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 15 that costs less to run day-to-day.