When two boats share the same hull type — in this case both the Pro-Drive X 16 x 48 (18 in. sides) 2008 and the Pro-Drive X 20 x 48 (18 in. sides) 2009 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?
The Pro-Drive X 16 x 48 (18 in. sides) 2008 is rated for up to 4 people. Passenger data for the Pro-Drive X 20 x 48 (18 in. sides) 2009 wasn't available.
Bottom line: The Pro-Drive X 16 x 48 (18 in. sides) 2008 at 16,0 ft is the right call if deck space, comfort, and entertaining are top of your list. The Pro-Drive X 20 x 48 (18 in. sides) 2009 at 2,0 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.