The Xpress Bass Series - SV18 Bass 2008 is a modified-V design and the Xpress XP200 Jet 2013 is a tunnel hull 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 Bass Series - SV18 Bass 2008 at 18,0 ft versus Xpress XP200 Jet 2013 at 20,3 ft. Weight tells a clearer story for trailering families: the Xpress XP200 Jet 2013 tips the scales at 1 261 lbs - 216 lbs less than the Xpress Bass Series - SV18 Bass 2008 at 1 045 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 power gap is worth calling out. Rated to 115 hp, the Xpress XP200 Jet 2013 has a 25-hp advantage over the Xpress Bass Series - SV18 Bass 2008's 90-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load.
For family outings this is probably the sharpest distinction between the two. The Xpress XP200 Jet 2013 is rated for 8 passengers, while the Xpress Bass Series - SV18 Bass 2008 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Xpress XP200 Jet 2013 could be the deciding factor.
Bottom line: Choose the Xpress XP200 Jet 2013 if your priority is putting more people on the water - it handles 8 passengers and at 20,3 ft it has the deck room to back that rating up comfortably. The Xpress Bass Series - SV18 Bass 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 4 that costs less to run day-to-day.