The Sundance 171 Bay 2006 vs Sundance NX19 2010 comparison sits squarely in the category of decisions where specs alone won't tell the whole story — intended use, storage, and long-term ownership costs all factor in.
On paper these two are close siblings in the size department — Sundance 171 Bay 2006 at 17,0 ft versus Sundance NX19 2010 at 18,8 ft. Weight tells a clearer story for trailering families: the Sundance NX19 2010 tips the scales at 1 475 lbs — 1 326 lbs less than the Sundance 171 Bay 2006 at 149 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 — 90 hp for the Sundance 171 Bay 2006 and 70 hp for the Sundance NX19 2010. 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. Fuel capacity breaks the other way: the Sundance 171 Bay 2006 carries 34 gallons versus 29 gallons in the Sundance NX19 2010. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
For family outings this is probably the sharpest distinction between the two. The Sundance NX19 2010 is rated for 6 passengers, while the Sundance 171 Bay 2006 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sundance NX19 2010 could be the deciding factor.
Bottom line: Choose the Sundance NX19 2010 if your priority is putting more people on the water — it handles 6 passengers and at 18,8 ft it has the deck room to back that rating up comfortably. The Sundance 171 Bay 2006 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.