Both the ThunderJet Bulldog 2009 and the ThunderJet Luxor Outboard Offshore - 21 ft. 2008 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?

The power gap is worth calling out. Rated to 500 hp, the ThunderJet Luxor Outboard Offshore - 21 ft. 2008 has a 300-hp advantage over the ThunderJet Bulldog 2009's 200-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the ThunderJet Luxor Outboard Offshore - 21 ft. 2008 carries 50 gallons versus 32 gallons in the ThunderJet Bulldog 2009. 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 Luxor Outboard Offshore - 21 ft. 2008 is rated for 6 passengers, while the ThunderJet Bulldog 2009 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the ThunderJet Luxor Outboard Offshore - 21 ft. 2008 could be the deciding factor.