Both the Malibu Response LX 2005 and the Malibu Sportster LX 2005 are modified-V designs, so 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 - Malibu Response LX 2005 at 20,0 ft versus Malibu Sportster LX 2005 at 20,0 ft. Weight tells a clearer story for trailering families: the Malibu Response LX 2005 tips the scales at 2 450 lbs - 200 lbs more than the Malibu Sportster LX 2005 at 2 250 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 - 400 hp for the Malibu Response LX 2005 and 400 hp for the Malibu Sportster LX 2005. 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 - 35 gal and 38 gal - so range won't be a tiebreaker here.
Both boats are rated for 8 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 Malibu Response LX 2005 and Malibu Sportster LX 2005 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.