Wouldn't be different, he wouldn't be able to master it, and he wouldn't be able to throw it, simple. Only sage mode can throw rasenshuriken, and even with all the senjutsu chakra, it's only good for two blows, so if it was possible in base mode, Minato would fatigue after one throw. Throwing the rasenshuriken allows it to expand, using it as a wind style: rasengan, would mean he would have to keep his hand to keep the fuuton rasengan spinning, not allowing him to teleport anywhere unless he wants to nullify the jutsu and remove the spin.