When two boats share the same hull type — in this case both the Starcraft Marine 1620 FLSS 2008 and the Starcraft Marine 170 IO 2008 are modified vee designs with aluminum construction — the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?

On paper these two are close siblings in the size department — Starcraft Marine 1620 FLSS 2008 at 16,0 ft versus Starcraft Marine 170 IO 2008 at 17,0 ft. Weight tells a clearer story for trailering families: the Starcraft Marine 170 IO 2008 tips the scales at 1 273 lbs — 765 lbs less than the Starcraft Marine 1620 FLSS 2008 at 508 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 150 hp, the Starcraft Marine 170 IO 2008 has a 110-hp advantage over the Starcraft Marine 1620 FLSS 2008's 40-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 170 IO 2008 is rated for 8 passengers, while the Starcraft Marine 1620 FLSS 2008 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Starcraft Marine 170 IO 2008 could be the deciding factor.

At this size, power-to-weight ratio matters more than outright horsepower. The Starcraft Marine 170 IO 2008 comes in at 9 lbs per hp versus 13 lbs per hp for the Starcraft Marine 1620 FLSS 2008. The lower the ratio the more explosive the acceleration — meaningful on a short RIB where bursts of speed, quick planing, and agility in surf or tight waterways define the experience.