When two boats share the same hull type — in this case both the Sundance F19FLX 2010 and the Sundance F19T 2013 are modified vee designs with fiberglass 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 — Sundance F19FLX 2010 at 18,8 ft versus Sundance F19T 2013 at 18,8 ft. Weight tells a clearer story for trailering families: the Sundance F19T 2013 tips the scales at 995 lbs — 883 lbs less than the Sundance F19FLX 2010 at 112 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 — 70 hp for the Sundance F19FLX 2010 and 90 hp for the Sundance F19T 2013. 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 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 Sundance F19T 2013 and its 90-hp ceiling. If fuel economy and quieter running matter more than top-end speed, the Sundance F19FLX 2010 with its 70-hp rating is the more economical daily driver.