Both the ThunderJet Alexis Classic 2012 and the ThunderJet Alexis OB Offshore 2009 are modified-V designs, both built in aluminium, so 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 - ThunderJet Alexis Classic 2012 at 21,0 ft versus ThunderJet Alexis OB Offshore 2009 at 21,0 ft. Weight tells a clearer story for trailering families: the ThunderJet Alexis Classic 2012 tips the scales at 3 400 lbs - 1 000 lbs more than the ThunderJet Alexis OB Offshore 2009 at 2 400 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 ThunderJet Alexis Classic 2012 carries a rated maximum of 320 hp. Engine data for the ThunderJet Alexis OB Offshore 2009 wasn't available in our records - check the manufacturer's spec sheet before sizing a motor.Fuel capacity breaks the other way: the ThunderJet Alexis Classic 2012 carries 80 gallons versus 50 gallons in the ThunderJet Alexis OB Offshore 2009. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

Both boats are rated for 6 passengers - a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.