First off the title of this crossover image relating to Devil May Cry is incorrect as there is only one generally accepted Dante and it is NOT the one dressed like a hobo with black hair,dirty trenchcoat with the British flag on it,wife beater,pants and boots while smoking a cancer.
Both guys shoot their respective guns. However the result is that the real and original Dante survives as he has been shot in the head before and it has done nothing but annoy him. The fake one or Donny if you will dies and his brains splatter all over the floor.
Long live the silver haired,red trenchcoat, and dressed like a cowboy son of Sparda who eats pizzas and strawberry sundae.