When two boats share the same hull type — in this case both the Crestliner C 1756 V 2006 and the Crestliner TC 18 2012 are modified vee 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 — Crestliner C 1756 V 2006 at 17,0 ft versus Crestliner TC 18 2012 at 18,3 ft. Weight tells a clearer story for trailering families: the Crestliner TC 18 2012 tips the scales at 1 044 lbs — 1 002 lbs less than the Crestliner C 1756 V 2006 at 42 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 90 hp, the Crestliner TC 18 2012 has a 40-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.
Both boats are rated for 4 passengers — a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.
Bottom line: Performance buyers should lean toward the Crestliner TC 18 2012 and its 90-hp ceiling. If fuel economy and quieter running matter more than top-end speed, the Crestliner C 1756 V 2006 with its 50-hp rating is the more economical daily driver.