Matching a flat Weld-Craft UVCDS 70 (20 ft.) 2008 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 75-hp advantage over the Weld-Craft UVCDS 70 (20 ft.) 2008's 40-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 Weld-Craft UVCDS 70 (20 ft.) 2008 is rated for 6 passengers, while the Weldcraft Marine 173 2010 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Weld-Craft UVCDS 70 (20 ft.) 2008 could be the deciding factor.
Bottom line: Choose the Weld-Craft UVCDS 70 (20 ft.) 2008 if your priority is putting more people on the water — it handles 6 passengers and at 2,0 ft it has the deck room to back that rating up comfortably. The Weldcraft Marine 173 2010 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.