The Sundance B18CCR 2009 vs Sundance B20CCR 2007 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 B18CCR 2009 at 17,8 ft versus Sundance B20CCR 2007 at 19,0 ft. At 1 690 lbs and 1 675 lbs respectively, both sit in a similar weight class - either should pair comfortably with most mid-size SUVs and half-ton trucks, though always confirm your specific tow rating with the motor added.
The power gap is worth calling out. Rated to 130 hp, the Sundance B20CCR 2007 has a 55-hp advantage over the Sundance B18CCR 2009's 75-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Both carry nearly identical fuel loads - 33 gal and 34 gal - so range won't be a tiebreaker here.
For family outings this is probably the sharpest distinction between the two. The Sundance B20CCR 2007 is rated for 8 passengers, while the Sundance B18CCR 2009 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sundance B20CCR 2007 could be the deciding factor.
Bottom line: Choose the Sundance B20CCR 2007 if your priority is putting more people on the water - it handles 8 passengers and at 19,0 ft it has the deck room to back that rating up comfortably. The Sundance B18CCR 2009 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.