The Crest Ultra Model 27 2004 vs Crest Upper Sundeck 27 2006 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 — Crest Ultra Model 27 2004 at 27,0 ft versus Crest Upper Sundeck 27 2006 at 27,0 ft. Weight tells a clearer story for trailering families: the Crest Upper Sundeck 27 2006 tips the scales at 3 988 lbs — 3 613 lbs less than the Crest Ultra Model 27 2004 at 375 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 200 hp, the Crest Ultra Model 27 2004 has a 50-hp advantage over the Crest Upper Sundeck 27 2006's 150-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 Crest Ultra Model 27 2004 is rated for 18 passengers, while the Crest Upper Sundeck 27 2006 caps at 15. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Crest Ultra Model 27 2004 could be the deciding factor.
Bottom line: Choose the Crest Ultra Model 27 2004 if your priority is putting more people on the water — it handles 18 passengers and at 27,0 ft it has the deck room to back that rating up comfortably. The Crest Upper Sundeck 27 2006 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 15 that costs less to run day-to-day.