Zacker

Hi to all I have Yamaha AeroxR but i want to buy Sportbike 125 cc. I heard that Aprilia RS125 is faster that Yamaha R125, but before my Yamaha Aerox i had Aprilia sr50, and it was fast but no strong, that's why i sell it, and buy Yamaha Aerox which was more stronger and fast, and know i don't know what to buy ? Thanks for answers !