When two boats share the same hull type — in this case both the Stamas 310 Express Inboard 2007 and the Stamas 320 Express Outboard 2008 are modified vee designs with fiberglass 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 — Stamas 310 Express Inboard 2007 at 32,0 ft versus Stamas 320 Express Outboard 2008 at 34,0 ft. At 105 lbs and 127 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 Stamas 310 Express Inboard 2007 carries a rated maximum of 500 hp. Engine data for the Stamas 320 Express Outboard 2008 wasn't available in our records — check the manufacturer's spec sheet before sizing a motor.Fuel capacity breaks the other way: the Stamas 320 Express Outboard 2008 carries 316 gallons versus 3 gallons in the Stamas 310 Express Inboard 2007. 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 Stamas 320 Express Outboard 2008 is rated for 10 passengers, while the Stamas 310 Express Inboard 2007 caps at 9. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Stamas 320 Express Outboard 2008 could be the deciding factor.