When two boats share the same hull type — in this case both the Phoenix Boats 721 ProXP 2013 and the Phoenix Boats 921 ProXP 2013 are modified vee designs with fiberglass 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 — Phoenix Boats 721 ProXP 2013 at 20,9 ft versus Phoenix Boats 921 ProXP 2013 at 21,5 ft. At 185 lbs and 195 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 Phoenix Boats 721 ProXP 2013 and 200 hp for the Phoenix Boats 921 ProXP 2013. 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 — 5 gal and 5 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.