different types of muscle fibers use different things for energy. fast twitch use ATP and burn out quick, slow twitch use oxygen and have stamina, you are not going to trick your body anytime soon. that's what happens inside your body, and you cannot make it any different
best to use a well rounded approach and hit them all, although fast twitch are optimal for hypertrophy, the guys with an abundance of fast twitch are the muscular guys. like EVERYTHING else in this game...comes down to genetics