Puppy food is largely a gimmick. When you think about it, a wolf mum (the domestic dog's closest relative) wouldn't go find special "puppy prey" to feed her cubs; she would feed her cubs the exact same thing she or the rest of her pack was eating, nothing special for puppies past the milk stage.
Taste of the Wild, like many other grain free foods, is an all life stages food. This means puppy to senior this food is perfectly fine.
So my vote, is no puppy food. Just feed the new one the Taste of the Wild if that's what you want him to eat.