1990 Honda CBR250RR

Honda CBR250RR : When I was reading an article about comparing new 2011 CBR250R VS old CBR 250 series in another motorcycles website, I was surprised that the 1990 Honda CBR250RR better performance then the latest CBR 250 series (2011 edition). We all know that Honda CBR is one of Honda's superior product, but there is a question which it came out from my head, why Honda has created new products