Both the Supra Launch 21V 2008 and the Supra Sunsport 20V 2012 are modified-V designs, both built in fibreglass, so the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?
On paper these two are close siblings in the size department - Supra Launch 21V 2008 at 21,0 ft versus Supra Sunsport 20V 2012 at 20,7 ft. Weight tells a clearer story for trailering families: the Supra Launch 21V 2008 tips the scales at 3 400 lbs - 300 lbs more than the Supra Sunsport 20V 2012 at 3 100 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 power gap is worth calling out. Rated to 450 hp, the Supra Launch 21V 2008 has a 125-hp advantage over the Supra Sunsport 20V 2012's 325-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Both carry nearly identical fuel loads - 40 gal and 39 gal - so range won't be a tiebreaker here.
For family outings this is probably the sharpest distinction between the two. The Supra Launch 21V 2008 is rated for 13 passengers, while the Supra Sunsport 20V 2012 caps at 10. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Supra Launch 21V 2008 could be the deciding factor.
Bottom line: Choose the Supra Launch 21V 2008 if your priority is putting more people on the water - it handles 13 passengers and at 21,0 ft it has the deck room to back that rating up comfortably. The Supra Sunsport 20V 2012 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 10 that costs less to run day-to-day.