When two boats share the same hull type — in this case both the Crestliner Backwater 1870 SC/CC 2010 and the Crestliner Canadian Series 18 Tiller 2009 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 Backwater 1870 SC/CC 2010 at 18,0 ft versus Crestliner Canadian Series 18 Tiller 2009 at 18,0 ft. Weight tells a clearer story for trailering families: the Crestliner Backwater 1870 SC/CC 2010 tips the scales at 1 175 lbs — 1 094 lbs more than the Crestliner Canadian Series 18 Tiller 2009 at 81 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 Crestliner Backwater 1870 SC/CC 2010 carries a rated maximum of 90 hp. Engine data for the Crestliner Canadian Series 18 Tiller 2009 wasn't available in our records — check the manufacturer's spec sheet before sizing a motor.

Both boats are rated for 5 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.