The Century Boats 1850 Dual Console 2009 is a modified-V design and the Century Boats 2001 Inshore 2013 is a deep-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 - Century Boats 1850 Dual Console 2009 at 17,8 ft versus Century Boats 2001 Inshore 2013 at 20,0 ft. Weight tells a clearer story for trailering families: the Century Boats 1850 Dual Console 2009 tips the scales at 1 900 lbs - 300 lbs more than the Century Boats 2001 Inshore 2013 at 1 600 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 175 hp, the Century Boats 2001 Inshore 2013 has a 25-hp advantage over the Century Boats 1850 Dual Console 2009's 150-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Both carry nearly identical fuel loads - 47 gal and 50 gal - so range won't be a tiebreaker here.
For family outings this is probably the sharpest distinction between the two. The Century Boats 2001 Inshore 2013 is rated for 6 passengers, while the Century Boats 1850 Dual Console 2009 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Century Boats 2001 Inshore 2013 could be the deciding factor.
Bottom line: Choose the Century Boats 2001 Inshore 2013 if your priority is putting more people on the water - it handles 6 passengers and at 20,0 ft it has the deck room to back that rating up comfortably. The Century Boats 1850 Dual Console 2009 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.