When two boats share the same hull type — in this case both the ThunderJet Alexis OB Offshore - 21 ft. 2008 and the ThunderJet Alexis OB Offshore - 22 ft. 2008 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?
Both boats share a closely matched power ceiling — 500 hp for the ThunderJet Alexis OB Offshore - 21 ft. 2008 and 500 hp for the ThunderJet Alexis OB Offshore - 22 ft. 2008. Real-world performance will come down more to which motor is actually bolted on, its load at the time, and whether it's a 4-stroke or 2-stroke setup. Both carry nearly identical fuel loads — 5 gal and 5 gal — so range won't be a tiebreaker here.
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.
Bottom line: The ThunderJet Alexis OB Offshore - 21 ft. 2008 and ThunderJet Alexis OB Offshore - 22 ft. 2008 are closely matched on the specs that matter most. Test-ride both on the water you actually use, check current dealer pricing, and factor in long-term service access before you sign.