Aprilia has revealed its latest middleweight masterpiece, the RS 457, for the global markets. It should first arrive in India, with its debut coinciding with the country's first-ever MotoGP race. With an expected price tag of Rs. 4.5 lakh (ex-showroom), it will rival the Kawasaki Ninja 400 on our shores. But which is better, the Italian brawler or the Japanese fighter? Let's find out.