The Pro-Line 20 Bay 2007 vs Pro-Line 21 Sport 2006 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.
Size is the most obvious dividing line here. The Pro-Line 21 Sport 2006 measures 21,0 feet overall (2006), giving it roughly 19,0 additional feet of deck space compared to the Pro-Line 20 Bay 2007 at 2,0 feet (2007). At 22 lbs and 26 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 — 200 hp for the Pro-Line 20 Bay 2007 and 200 hp for the Pro-Line 21 Sport 2006. 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 — 6 gal and 7 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 Pro-Line 21 Sport 2006 at 21,0 ft is the right call if deck space, comfort, and entertaining are top of your list. The Pro-Line 20 Bay 2007 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.