Matching a deep vee Ultracraft 178W 2010 against a modified vee Ultracraft 189FS 2012 means you're likely deciding between two genuinely different on-water experiences. Hull type shapes everything from ride quality and fuel burn to dock handling and resale trajectory.
On paper these two are close siblings in the size department — Ultracraft 178W 2010 at 17,7 ft versus Ultracraft 189FS 2012 at 18,8 ft. At 112 lbs and 178 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 115 hp, the Ultracraft 178W 2010 has a 100-hp advantage over the Ultracraft 189FS 2012's 15-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Ultracraft 189FS 2012 carries 35 gallons versus 24 gallons in the Ultracraft 178W 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 Ultracraft 189FS 2012 is rated for 8 passengers, while the Ultracraft 178W 2010 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Ultracraft 189FS 2012 could be the deciding factor.
Bottom line: Choose the Ultracraft 189FS 2012 if your priority is putting more people on the water — it handles 8 passengers and at 18,8 ft it has the deck room to back that rating up comfortably. The Ultracraft 178W 2010 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 6 that costs less to run day-to-day.