The Nautique G23 2013 is a deep-V design and the Nautique Ski Nautique 206 2008 is a modified-V design, so you're likely deciding between two noticeably different on-water experiences. Hull type shapes everything from ride quality and fuel burn to dock handling and resale trajectory.
On paper these two are close siblings in the size department - Nautique G23 2013 at 23,0 ft versus Nautique Ski Nautique 206 2008 at 20,0 ft. Weight tells a clearer story for trailering families: the Nautique G23 2013 tips the scales at 5 400 lbs - 2 570 lbs more than the Nautique Ski Nautique 206 2008 at 2 830 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 - 409 hp for the Nautique G23 2013 and 390 hp for the Nautique Ski Nautique 206 2008. 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. Fuel capacity breaks the other way: the Nautique G23 2013 carries 65 gallons versus 29 gallons in the Nautique Ski Nautique 206 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 Nautique G23 2013 is rated for 16 passengers, while the Nautique Ski Nautique 206 2008 caps at 9. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Nautique G23 2013 could be the deciding factor.
Bottom line: Choose the Nautique G23 2013 if your priority is putting more people on the water - it handles 16 passengers and at 23,0 ft it has the deck room to back that rating up comfortably. The Nautique Ski Nautique 206 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 9 that costs less to run day-to-day.