The Pro-Drive X 18 x 54 (21 in. sides) 2007 vs Pro-Drive X 20 x 48 (18 in. sides) 2009 comparison sits squarely in the category of decisions where specs alone won't tell the whole story — intended use, storage, and long-term ownership costs all factor in.
The Pro-Drive X 18 x 54 (21 in. sides) 2007 is rated for up to 5 people. Passenger data for the Pro-Drive X 20 x 48 (18 in. sides) 2009 wasn't available.
Bottom line: The Pro-Drive X 18 x 54 (21 in. sides) 2007 at 18,0 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.