Matching a deep vee Custom Weld 19 ft. Viper Series 2013 against a modified vee Custom Weld Storm - 21 ft. 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.
On paper these two are close siblings in the size department — Custom Weld 19 ft. Viper Series 2013 at 18,7 ft versus Custom Weld Storm - 21 ft. 2010 at 21,0 ft. Weight tells a clearer story for trailering families: the Custom Weld Storm - 21 ft. 2010 tips the scales at 345 lbs — 321 lbs less than the Custom Weld 19 ft. Viper Series 2013 at 24 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.
For family outings this is probably the sharpest distinction between the two. The Custom Weld Storm - 21 ft. 2010 is rated for 6 passengers, while the Custom Weld 19 ft. Viper Series 2013 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Custom Weld Storm - 21 ft. 2010 could be the deciding factor.
Bottom line: Choose the Custom Weld Storm - 21 ft. 2010 if your priority is putting more people on the water — it handles 6 passengers and at 21,0 ft it has the deck room to back that rating up comfortably. The Custom Weld 19 ft. Viper Series 2013 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.