The Kingfisher 1725 Flex SC 2013 is a deep-V design and the Kingfisher 1825 Trio Side Console 2012 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 - Kingfisher 1725 Flex SC 2013 at 17,5 ft versus Kingfisher 1825 Trio Side Console 2012 at 17,7 ft. Weight tells a clearer story for trailering families: the Kingfisher 1725 Flex SC 2013 tips the scales at 1 495 lbs - 395 lbs more than the Kingfisher 1825 Trio Side Console 2012 at 1 100 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 Kingfisher 1825 Trio Side Console 2012 tops out at 115 hp. Engine specs for the Kingfisher 1725 Flex SC 2013 aren't listed - confirm with a dealer before selecting an outboard.Fuel capacity breaks the other way: the Kingfisher 1725 Flex SC 2013 carries 35 gallons versus 20 gallons in the Kingfisher 1825 Trio Side Console 2012. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
Both boats are rated for 5 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.
Bottom line: The Kingfisher 1725 Flex SC 2013 and Kingfisher 1825 Trio Side Console 2012 are closely matched on the specs that matter most. Test-ride both on the water you actually use, check current dealer pricing, and factor in long-term service access before you sign.