The Xpress 1650D 2011 is a flat-bottom design and the Xpress Bayou 18V 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 - Xpress 1650D 2011 at 16,0 ft versus Xpress Bayou 18V 2012 at 18,0 ft. Weight tells a clearer story for trailering families: the Xpress Bayou 18V 2012 tips the scales at 750 lbs - 340 lbs less than the Xpress 1650D 2011 at 410 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 70 hp, the Xpress Bayou 18V 2012 has a 30-hp advantage over the Xpress 1650D 2011's 40-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.
At this size, power-to-weight ratio matters more than outright horsepower. The Xpress 1650D 2011 comes in at 10 lbs per hp versus 11 lbs per hp for the Xpress Bayou 18V 2012. 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.
Bottom line: Performance buyers should lean toward the Xpress Bayou 18V 2012 and its 70-hp ceiling. If fuel economy and quieter running matter more than top-end speed, the Xpress 1650D 2011 with its 40-hp rating is the more economical daily driver.