This body shape is often referred to as a "Vita" body on the basis that the original Ukulele shaped like this was the Roy Smeck Vita, however the name came from Roy boosting his income advertising Vitaphone. The actual shape is based on an A Style Mandolin and the purpose behind using it is to increase the surface area of the soundboard in the lower bout thus making the Ukulele acoustically louder. This is certainly one of my loudest Soprano's and it has a nice tone and good sustain too. On top of this, Clearwater have fitted a passive pickup so you can amplify it in case it is not loud enough.
It has a spruce top with a mahogany back and sides and is pretty much identical to the Ohana CKP70R except that it has a passive pickup fitted and geared machine heads rather than friction ones, I don't know why the Clearwater is the same as one in the Ohana range but as they are all made in China, I think they come from the same factory. Quality wise there is nothing at all wrong with it so I don't think it is a second. It is a very good Ukulele