Matching a flat Starcraft Marine 1648 2013 against a modified vee Starcraft Marine Star Step OB Series 2009 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 Star Step OB Series 2009 measures 21,0 feet overall (2009), giving it roughly 5,0 additional feet of deck space compared to the Starcraft Marine 1648 2013 at 16,0 feet (2013). At 295 lbs and 284 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 250 hp, the Starcraft Marine Star Step OB Series 2009 has a 215-hp advantage over the Starcraft Marine 1648 2013's 35-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 Star Step OB Series 2009 is rated for 12 passengers, while the Starcraft Marine 1648 2013 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Starcraft Marine Star Step OB Series 2009 could be the deciding factor.
Bottom line: Choose the Starcraft Marine Star Step OB Series 2009 if your priority is putting more people on the water — it handles 12 passengers and at 21,0 ft it has the deck room to back that rating up comfortably. The Starcraft Marine 1648 2013 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 4 that costs less to run day-to-day.