When two boats share the same hull type — in this case both the Sundance DX20 2012 and the Sundance FX19 Vapor 2011 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 — Sundance DX20 2012 at 19,8 ft versus Sundance FX19 Vapor 2011 at 19,1 ft. Weight tells a clearer story for trailering families: the Sundance DX20 2012 tips the scales at 1 575 lbs — 1 473 lbs more than the Sundance FX19 Vapor 2011 at 102 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.
Both boats share a closely matched power ceiling — 130 hp for the Sundance DX20 2012 and 150 hp for the Sundance FX19 Vapor 2011. 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 — 33 gal and 31 gal — so range won't be a tiebreaker here.
For family outings this is probably the sharpest distinction between the two. The Sundance DX20 2012 is rated for 8 passengers, while the Sundance FX19 Vapor 2011 caps at 3. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sundance DX20 2012 could be the deciding factor.
Bottom line: Choose the Sundance DX20 2012 if your priority is putting more people on the water — it handles 8 passengers and at 19,8 ft it has the deck room to back that rating up comfortably. The Sundance FX19 Vapor 2011 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 3 that costs less to run day-to-day.