Matching a modified vee Starcraft Marine Bay 170 2013 against a deep vee Starcraft Marine STX 186 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.

On paper these two are close siblings in the size department — Starcraft Marine Bay 170 2013 at 16,5 ft versus Starcraft Marine STX 186 Viper 2013 at 18,5 ft. Weight tells a clearer story for trailering families: the Starcraft Marine STX 186 Viper 2013 tips the scales at 1 763 lbs — 702 lbs less than the Starcraft Marine Bay 170 2013 at 1 061 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 175 hp, the Starcraft Marine STX 186 Viper 2013 has a 60-hp advantage over the Starcraft Marine Bay 170 2013's 115-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Starcraft Marine STX 186 Viper 2013 carries 43 gallons versus 19 gallons in the Starcraft Marine Bay 170 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 Starcraft Marine STX 186 Viper 2013 is rated for 6 passengers, while the Starcraft Marine Bay 170 2013 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 186 Viper 2013 could be the deciding factor.