The Xpress DVX 175 2013 is a deep-V design and the Xpress HD20SCA 2011 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 - Xpress DVX 175 2013 at 17,5 ft versus Xpress HD20SCA 2011 at 20,0 ft. At 1 215 lbs and 1 190 lbs respectively, both sit in a similar weight class - either should pair comfortably with most mid-size SUVs and half-ton trucks, though always confirm your specific tow rating with the motor added.
Both boats share a closely matched power ceiling - 115 hp for the Xpress DVX 175 2013 and 130 hp for the Xpress HD20SCA 2011. 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 - 30 gal and 31 gal - so range won't be a tiebreaker here.
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 Xpress HD20SCA 2011 at 20,0 ft is the right call if deck space, comfort, and entertaining are top of your list. The Xpress DVX 175 2013 at 17,5 ft wins on trailering ease, likely lower purchase price, and simpler docking - a solid choice for a buyer who wants more boat for less money.