When two boats share the same hull type — in this case both the Monterey 220 EX 2008 and the Monterey 234 FS 2008 are modified vee designs with fiberglass 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?
On paper these two are close siblings in the size department — Monterey 220 EX 2008 at 21,0 ft versus Monterey 234 FS 2008 at 24,0 ft. At 42 lbs and 43 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.
Both boats share a closely matched power ceiling — 320 hp for the Monterey 220 EX 2008 and 320 hp for the Monterey 234 FS 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. Fuel capacity breaks the other way: the Monterey 234 FS 2008 carries 62 gallons versus 5 gallons in the Monterey 220 EX 2008. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
Bottom line: The Monterey 234 FS 2008 at 24,0 ft is the right call if deck space, comfort, and entertaining are top of your list. The Monterey 220 EX 2008 at 21,0 ft wins on trailering ease, likely lower purchase price, and simpler docking — a solid choice for a buyer who wants more boat for less money.