Both the Nautica LC 20 2011 and the Nautica Nano 15 2011 are rigid inflatable designs, both built in fibreglass, so 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 230 hp, the Nautica LC 20 2011 has a 190-hp advantage over the Nautica Nano 15 2011's 40-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load.
Both boats are rated for 10 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 Nautica LC 20 2011 at 20,0 ft is the right call if deck space, comfort, and entertaining are top of your list. The Nautica Nano 15 2011 at 15,1 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.