When two boats share the same hull type — in this case both the ThunderJet Denali 2012 and the ThunderJet Havasu 2010 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?
Size is the most obvious dividing line here. The ThunderJet Denali 2012 measures 18,0 feet overall (2012), giving it roughly 16,0 additional feet of deck space compared to the ThunderJet Havasu 2010 at 2,0 feet (2010). At 19 lbs and 26 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 ThunderJet Havasu 2010 tops out at 25 hp. Engine specs for the ThunderJet Denali 2012 aren't listed — confirm with a dealer before selecting an outboard.Fuel capacity breaks the other way: the ThunderJet Denali 2012 carries 48 gallons versus 5 gallons in the ThunderJet Havasu 2010. 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 Havasu 2010 is rated for 6 passengers, while the ThunderJet Denali 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 Havasu 2010 could be the deciding factor.
Bottom line: Choose the ThunderJet Havasu 2010 if your priority is putting more people on the water — it handles 6 passengers and at 2,0 ft it has the deck room to back that rating up comfortably. The ThunderJet Denali 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.