Matching a modified vee Starcraft Marine SF 1420 FLSS 2009 against a deep vee Starcraft Marine STX 206 Viper 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.
Size is the most obvious dividing line here. The Starcraft Marine STX 206 Viper 2013 measures 20,5 feet overall (2013), giving it roughly 6,5 additional feet of deck space compared to the Starcraft Marine SF 1420 FLSS 2009 at 14,0 feet (2009). At 4 lbs and 24 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 power gap is worth calling out. Rated to 300 hp, the Starcraft Marine STX 206 Viper 2013 has a 275-hp advantage over the Starcraft Marine SF 1420 FLSS 2009's 25-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load.
For family outings this is probably the sharpest distinction between the two. The Starcraft Marine STX 206 Viper 2013 is rated for 6 passengers, while the Starcraft Marine SF 1420 FLSS 2009 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Starcraft Marine STX 206 Viper 2013 could be the deciding factor.
Bottom line: Choose the Starcraft Marine STX 206 Viper 2013 if your priority is putting more people on the water — it handles 6 passengers and at 20,5 ft it has the deck room to back that rating up comfortably. The Starcraft Marine SF 1420 FLSS 2009 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.