The Custom Weld 19 ft. Viper Series 2013 is a deep-V design and the Custom Weld Cobra SE - 20 ft. 2010 is a modified-V design, so you're likely deciding between two noticeably 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 Cobra SE - 20 ft. 2010 at 20,0 ft. Weight tells a clearer story for trailering families: the Custom Weld Cobra SE - 20 ft. 2010 tips the scales at 2 700 lbs - 300 lbs less than the Custom Weld 19 ft. Viper Series 2013 at 2 400 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 Custom Weld Cobra SE - 20 ft. 2010 tops out at 350 hp. Engine specs for the Custom Weld 19 ft. Viper Series 2013 aren't listed - confirm with a dealer before selecting an outboard.Fuel capacity breaks the other way: the Custom Weld Cobra SE - 20 ft. 2010 carries 52 gallons versus 38 gallons in the Custom Weld 19 ft. Viper Series 2013. 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 Custom Weld Cobra SE - 20 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 Cobra SE - 20 ft. 2010 could be the deciding factor.
Bottom line: Choose the Custom Weld Cobra SE - 20 ft. 2010 if your priority is putting more people on the water - it handles 6 passengers and at 20,0 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.