When two boats share the same hull type — in this case both the Nautica RIB 18 Deluxe 2011 and the Nautica RIB 40 Express 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?

The power gap is worth calling out. Rated to 370 hp, the Nautica RIB 40 Express 2011 has a 255-hp advantage over the Nautica RIB 18 Deluxe 2011's 115-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load.

Both boats are rated for 12 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.