The Crestliner Kodiak 18 SC 2013 is a deep-V design and the Crestliner Retriever 2070 CC 2012 is a modified-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.
On paper these two are close siblings in the size department - Crestliner Kodiak 18 SC 2013 at 18,0 ft versus Crestliner Retriever 2070 CC 2012 at 20,0 ft. Weight tells a clearer story for trailering families: the Crestliner Retriever 2070 CC 2012 tips the scales at 1 170 lbs - 260 lbs less than the Crestliner Kodiak 18 SC 2013 at 910 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 Crestliner Retriever 2070 CC 2012 has a 40-hp advantage over the Crestliner Kodiak 18 SC 2013's 75-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load.
Both boats are rated for 6 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 Retriever 2070 CC 2012 and its 115-hp ceiling. If fuel economy and quieter running matter more than top-end speed, the Crestliner Kodiak 18 SC 2013 with its 75-hp rating is the more economical daily driver.