The Sun Tracker Party Barge 20 2011 is a pontoon design and the Sun Tracker Party Deck 21 I/O 2008 is a modified-V design, so you're likely deciding between two noticeably different on-water experiences. Hull type shapes everything from ride quality and fuel burn to dock handling and resale trajectory.

On paper these two are close siblings in the size department - Sun Tracker Party Barge 20 2011 at 21,7 ft versus Sun Tracker Party Deck 21 I/O 2008 at 20,0 ft. Weight tells a clearer story for trailering families: the Sun Tracker Party Deck 21 I/O 2008 tips the scales at 2 250 lbs - 635 lbs less than the Sun Tracker Party Barge 20 2011 at 1 615 lbs. That difference is meaningful if you're working within a half-ton or three-quarter-ton truck's tow rating, especially once you factor in a motor, gear, and fuel.

The power gap is worth calling out. Rated to 220 hp, the Sun Tracker Party Deck 21 I/O 2008 has a 105-hp advantage over the Sun Tracker Party Barge 20 2011's 115-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Both carry nearly identical fuel loads - 42 gal and 41 gal - so range won't be a tiebreaker here.

Both boats are rated for 10 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.