The Xpress 1650 2011 is a flat-bottom design and the Xpress XP16PFC 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 1650 2011 at 16,0 ft versus Xpress XP16PFC 2012 at 16,0 ft. Weight tells a clearer story for trailering families: the Xpress XP16PFC 2012 tips the scales at 675 lbs - 291 lbs less than the Xpress 1650 2011 at 384 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.
Both boats share a closely matched power ceiling - 40 hp for the Xpress 1650 2011 and 60 hp for the Xpress XP16PFC 2012. Real-world performance will come down more to which motor is actually bolted on, its load at the time, and whether it's a 4-stroke or 2-stroke setup.
Both boats are rated for 3 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 1650 2011 comes in at 10 lbs per hp versus 11 lbs per hp for the Xpress XP16PFC 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 XP16PFC 2012 and its 60-hp ceiling. If fuel economy and quieter running matter more than top-end speed, the Xpress 1650 2011 with its 40-hp rating is the more economical daily driver.