When two boats share the same hull type — in this case both the Nautica Lowbody 19 2011 and the Nautica RIB 18 Widebody ST 2011 are inflatable rigid designs with fiberglass construction — 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 — Nautica Lowbody 19 2011 at 19,0 ft versus Nautica RIB 18 Widebody ST 2011 at 17,8 ft. At 32 lbs and 125 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.
The power gap is worth calling out. Rated to 260 hp, the Nautica Lowbody 19 2011 has a 145-hp advantage over the Nautica RIB 18 Widebody ST 2011's 115-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 Nautica Lowbody 19 2011 is rated for 16 passengers, while the Nautica RIB 18 Widebody ST 2011 caps at 14. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Nautica Lowbody 19 2011 could be the deciding factor.
Bottom line: Choose the Nautica Lowbody 19 2011 if your priority is putting more people on the water — it handles 16 passengers and at 19,0 ft it has the deck room to back that rating up comfortably. The Nautica RIB 18 Widebody ST 2011 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 14 that costs less to run day-to-day.