The ThunderJet Alexis OB Offshore 2009 is a modified-V design and the ThunderJet V182-Eco 2012 is a deep-V design, so you're likely deciding between two noticeably 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 - ThunderJet Alexis OB Offshore 2009 at 21,0 ft versus ThunderJet V182-Eco 2012 at 18,2 ft. Weight tells a clearer story for trailering families: the ThunderJet Alexis OB Offshore 2009 tips the scales at 2 400 lbs - 1 230 lbs more than the ThunderJet V182-Eco 2012 at 1 170 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 V182-Eco 2012 tops out at 115 hp. Engine specs for the ThunderJet Alexis OB Offshore 2009 aren't listed - confirm with a dealer before selecting an outboard.Fuel capacity breaks the other way: the ThunderJet Alexis OB Offshore 2009 carries 50 gallons versus 32 gallons in the ThunderJet V182-Eco 2012. 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 ThunderJet Alexis OB Offshore 2009 is rated for 6 passengers, while the ThunderJet V182-Eco 2012 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the ThunderJet Alexis OB Offshore 2009 could be the deciding factor.
Bottom line: Choose the ThunderJet Alexis OB Offshore 2009 if your priority is putting more people on the water - it handles 6 passengers and at 21,0 ft it has the deck room to back that rating up comfortably. The ThunderJet V182-Eco 2012 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.