The PlayCraft FX4 FishDeck Series 2009 is a planing design and the PlayCraft Ultra 2800 Voyager OB 2007 is a pontoon 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.
Both boats share a closely matched power ceiling - 225 hp for the PlayCraft FX4 FishDeck Series 2009 and 225 hp for the PlayCraft Ultra 2800 Voyager OB 2007. 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 PlayCraft Ultra 2800 Voyager OB 2007 carries 103 gallons versus 70 gallons in the PlayCraft FX4 FishDeck Series 2009. 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 PlayCraft Ultra 2800 Voyager OB 2007 is rated for 18 passengers, while the PlayCraft FX4 FishDeck Series 2009 caps at 10. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the PlayCraft Ultra 2800 Voyager OB 2007 could be the deciding factor.
Bottom line: Choose the PlayCraft Ultra 2800 Voyager OB 2007 if your priority is putting more people on the water - it handles 18 passengers and at 28,0 ft it has the deck room to back that rating up comfortably. The PlayCraft FX4 FishDeck Series 2009 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 10 that costs less to run day-to-day.