When two boats share the same hull type — in this case both the Allison XB-21 BasSport Pro 2013 and the Allison XB-21 ProSport S.U.B. 2013 are modified vee designs with composite 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 — Allison XB-21 BasSport Pro 2013 at 21,2 ft versus Allison XB-21 ProSport S.U.B. 2013 at 21,2 ft. Weight tells a clearer story for trailering families: the Allison XB-21 BasSport Pro 2013 tips the scales at 135 lbs — 122 lbs more than the Allison XB-21 ProSport S.U.B. 2013 at 13 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 Allison XB-21 ProSport S.U.B. 2013 tops out at 510 hp. Engine specs for the Allison XB-21 BasSport Pro 2013 aren't listed — confirm with a dealer before selecting an outboard.Both carry nearly identical fuel loads — 36 gal and 36 gal — so range won't be a tiebreaker here.
For family outings this is probably the sharpest distinction between the two. The Allison XB-21 BasSport Pro 2013 is rated for 6 passengers, while the Allison XB-21 ProSport S.U.B. 2013 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Allison XB-21 BasSport Pro 2013 could be the deciding factor.
Bottom line: Choose the Allison XB-21 BasSport Pro 2013 if your priority is putting more people on the water — it handles 6 passengers and at 21,2 ft it has the deck room to back that rating up comfortably. The Allison XB-21 ProSport S.U.B. 2013 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.