When two boats share the same hull type — in this case both the Sundance B18CC 2010 and the Sundance SV171 2012 are modified vee designs with fiberglass 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 — Sundance B18CC 2010 at 17,8 ft versus Sundance SV171 2012 at 17,1 ft. Weight tells a clearer story for trailering families: the Sundance B18CC 2010 tips the scales at 1 295 lbs — 1 170 lbs more than the Sundance SV171 2012 at 125 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 115 hp, the Sundance SV171 2012 has a 40-hp advantage over the Sundance B18CC 2010's 75-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Both carry nearly identical fuel loads — 33 gal and 34 gal — so range won't be a tiebreaker here.

For family outings this is probably the sharpest distinction between the two. The Sundance B18CC 2010 is rated for 6 passengers, while the Sundance SV171 2012 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sundance B18CC 2010 could be the deciding factor.

At this size, power-to-weight ratio matters more than outright horsepower. The Sundance SV171 2012 comes in at 1 lbs per hp versus 17 lbs per hp for the Sundance B18CC 2010. The lower the ratio the more explosive the acceleration — meaningful on a short RIB where bursts of speed, quick planing, and agility in surf or tight waterways define the experience.