Matching a flat Weld-Craft CLT 42 (14 ft.) 2009 against a deep vee Weldcraft Marine 173 2010 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.
The power gap is worth calling out. Rated to 115 hp, the Weldcraft Marine 173 2010 has a 90-hp advantage over the Weld-Craft CLT 42 (14 ft.) 2009's 25-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 Weldcraft Marine 173 2010 is rated for 5 passengers, while the Weld-Craft CLT 42 (14 ft.) 2009 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Weldcraft Marine 173 2010 could be the deciding factor.
Bottom line: Choose the Weldcraft Marine 173 2010 if your priority is putting more people on the water — it handles 5 passengers and at 17,3 ft it has the deck room to back that rating up comfortably. The Weld-Craft CLT 42 (14 ft.) 2009 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 4 that costs less to run day-to-day.