Theoretically, the rear tanks of the Cougar will give a little more top end. With a belly tank, you also lose under seat storage, which is a nice feature. Not sure if you noticed, but on the regular Puma you have the rectangular live wells, as opposed to the massive triangular wells of the Cougar. Rectangular tanks give you slightly larger rear storage areas. Of the three Cats that I have owned, my 2013 Cougar AE was my favourite.