When two boats share the same hull type — in this case both the Allison XB-21 BasSport 2+2 Bass 2010 and the Allison XB-21 ProSport 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?

The Allison XB-21 ProSport 2013 tops out at 510 hp. Engine specs for the Allison XB-21 BasSport 2+2 Bass 2010 aren't listed — confirm with a dealer before selecting an outboard.Fuel capacity breaks the other way: the Allison XB-21 ProSport 2013 carries 36 gallons versus 3 gallons in the Allison XB-21 BasSport 2+2 Bass 2010. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

For family outings this is probably the sharpest distinction between the two. The Allison XB-21 ProSport 2013 is rated for 6 passengers, while the Allison XB-21 BasSport 2+2 Bass 2010 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Allison XB-21 ProSport 2013 could be the deciding factor.