When two boats share the same hull type — in this case both the Sundance F19T 2013 and the Sundance NX21 2009 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 F19T 2013 at 18,8 ft versus Sundance NX21 2009 at 21,1 ft. Weight tells a clearer story for trailering families: the Sundance F19T 2013 tips the scales at 995 lbs — 810 lbs more than the Sundance NX21 2009 at 185 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 Sundance NX21 2009 has a 25-hp advantage over the Sundance F19T 2013's 90-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load.
For family outings this is probably the sharpest distinction between the two. The Sundance NX21 2009 is rated for 8 passengers, while the Sundance F19T 2013 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sundance NX21 2009 could be the deciding factor.
Bottom line: Choose the Sundance NX21 2009 if your priority is putting more people on the water — it handles 8 passengers and at 21,1 ft it has the deck room to back that rating up comfortably. The Sundance F19T 2013 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 6 that costs less to run day-to-day.