The Crestliner C 1756 V 2006 is a modified-V design and the Crestliner Sportfish 2150 SST 2013 is a deep-V design, so you're likely deciding between two noticeably different on-water experiences. Hull type shapes everything from ride quality and fuel burn to dock handling and resale trajectory.
Size is the most obvious dividing line here. The Crestliner Sportfish 2150 SST 2013 measures 22,8 feet overall (2013), giving it roughly 5,8 additional feet of deck space compared to the Crestliner C 1756 V 2006 at 17,0 feet (2006). Weight tells a clearer story for trailering families: the Crestliner Sportfish 2150 SST 2013 tips the scales at 2 100 lbs - 1 680 lbs less than the Crestliner C 1756 V 2006 at 420 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 300 hp, the Crestliner Sportfish 2150 SST 2013 has a 250-hp advantage over the Crestliner C 1756 V 2006's 50-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 Crestliner Sportfish 2150 SST 2013 is rated for 9 passengers, while the Crestliner C 1756 V 2006 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Crestliner Sportfish 2150 SST 2013 could be the deciding factor.
Bottom line: Choose the Crestliner Sportfish 2150 SST 2013 if your priority is putting more people on the water - it handles 9 passengers and at 22,8 ft it has the deck room to back that rating up comfortably. The Crestliner C 1756 V 2006 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 4 that costs less to run day-to-day.