Matching a tunnel SeaArk BayRunner MVT 2013 against a modified vee SeaArk Forecast 156 2008 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 SeaArk BayRunner MVT 2013 measures 20,1 feet overall (2013), giving it roughly 5,1 additional feet of deck space compared to the SeaArk Forecast 156 2008 at 15,0 feet (2008). At 119 lbs and 68 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 140 hp, the SeaArk BayRunner MVT 2013 has a 100-hp advantage over the SeaArk Forecast 156 2008's 40-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the SeaArk Forecast 156 2008 carries 15 gallons versus 3 gallons in the SeaArk BayRunner MVT 2013. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
For family outings this is probably the sharpest distinction between the two. The SeaArk BayRunner MVT 2013 is rated for 6 passengers, while the SeaArk Forecast 156 2008 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the SeaArk BayRunner MVT 2013 could be the deciding factor.
Bottom line: Choose the SeaArk BayRunner MVT 2013 if your priority is putting more people on the water — it handles 6 passengers and at 20,1 ft it has the deck room to back that rating up comfortably. The SeaArk Forecast 156 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 4 that costs less to run day-to-day.