The Supra Launch 20 SSV 2006 vs Supra Launch 21 2005 comparison sits squarely in the category of decisions where specs alone won't tell the whole story: intended use, storage, and long-term ownership costs all factor in.
On paper these two are close siblings in the size department - Supra Launch 20 SSV 2006 at 20,0 ft versus Supra Launch 21 2005 at 21,0 ft. At 3 200 lbs and 3 200 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.
The Supra Launch 20 SSV 2006 carries a rated maximum of 340 hp. Engine data for the Supra Launch 21 2005 wasn't available in our records - check the manufacturer's spec sheet before sizing a motor.
For family outings this is probably the sharpest distinction between the two. The Supra Launch 21 2005 is rated for 13 passengers, while the Supra Launch 20 SSV 2006 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 21 2005 could be the deciding factor.
Bottom line: Choose the Supra Launch 21 2005 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 Launch 20 SSV 2006 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 10 that costs less to run day-to-day.