Both the Crestliner Backwater 1870 SC/CC 2010 and the Crestliner Sportfish Series 1950 SST 2009 are modified-V 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?

On paper these two are close siblings in the size department - Crestliner Backwater 1870 SC/CC 2010 at 18,0 ft versus Crestliner Sportfish Series 1950 SST 2009 at 20,0 ft. Weight tells a clearer story for trailering families: the Crestliner Sportfish Series 1950 SST 2009 tips the scales at 1 850 lbs - 675 lbs less than the Crestliner Backwater 1870 SC/CC 2010 at 1 175 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 200 hp, the Crestliner Sportfish Series 1950 SST 2009 has a 110-hp advantage over the Crestliner Backwater 1870 SC/CC 2010's 90-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 Series 1950 SST 2009 is rated for 8 passengers, while the Crestliner Backwater 1870 SC/CC 2010 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Crestliner Sportfish Series 1950 SST 2009 could be the deciding factor.