When two boats share the same hull type — in this case both the Sundance F19FLX 2008 and the Sundance SV23 2009 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?
Size is the most obvious dividing line here. The Sundance SV23 2009 measures 23,1 feet overall (2009), giving it roughly 5,1 additional feet of deck space compared to the Sundance F19FLX 2008 at 18,0 feet (2008). Weight tells a clearer story for trailering families: the Sundance F19FLX 2008 tips the scales at 1 105 lbs — 1 082 lbs more than the Sundance SV23 2009 at 23 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 200 hp, the Sundance SV23 2009 has a 110-hp advantage over the Sundance F19FLX 2008's 90-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Sundance SV23 2009 carries 72 gallons versus 24 gallons in the Sundance F19FLX 2008. 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 Sundance SV23 2009 is rated for 7 passengers, while the Sundance F19FLX 2008 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sundance SV23 2009 could be the deciding factor.
Bottom line: Choose the Sundance SV23 2009 if your priority is putting more people on the water — it handles 7 passengers and at 23,1 ft it has the deck room to back that rating up comfortably. The Sundance F19FLX 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.