The Sundance 201 Bay 2006 vs Sundance SV186 2011 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 201 Bay 2006 at 20,0 ft versus Sundance SV186 2011 at 18,5 ft. Weight tells a clearer story for trailering families: the Sundance 201 Bay 2006 tips the scales at 1 660 lbs - 210 lbs more than the Sundance SV186 2011 at 1 450 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 - 150 hp for the Sundance 201 Bay 2006 and 150 hp for the Sundance SV186 2011. 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 carry nearly identical fuel loads - 40 gal and 40 gal - so range won't be a tiebreaker here.
For family outings this is probably the sharpest distinction between the two. The Sundance 201 Bay 2006 is rated for 6 passengers, while the Sundance SV186 2011 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sundance 201 Bay 2006 could be the deciding factor.
Bottom line: Choose the Sundance 201 Bay 2006 if your priority is putting more people on the water - it handles 6 passengers and at 20,0 ft it has the deck room to back that rating up comfortably. The Sundance SV186 2011 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.