Matching a modified vee Custom Weld Viper II Outboard - 19 ft. 2010 against a tunnel Custom Weld X-Caliber 2013 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 Viper II Outboard - 19 ft. 2010 at 19,0 ft versus Custom Weld X-Caliber 2013 at 21,0 ft. At 12 lbs and 28 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.
For family outings this is probably the sharpest distinction between the two. The Custom Weld X-Caliber 2013 is rated for 6 passengers, while the Custom Weld Viper II Outboard - 19 ft. 2010 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 X-Caliber 2013 could be the deciding factor.
Bottom line: Choose the Custom Weld X-Caliber 2013 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 Viper II Outboard - 19 ft. 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.