Why do you want to switch foods? The answer to that will determine if either formula suits you better or (which is more often the case) it doesnt  matter which you choose.
Saying that, unless a puppy is on a really crappy food, its not so advisable to switch foods for a puppy under 5-6 months old. For a large breed (like you have) its not such a big concern but still if there is no specific need i would delay for a couple of months as Fish4 isnt a particularly bad food.

Hi all, anyone knows where to buy Fish4dogs Superior Puppy Food Complete (12kg) with good price. Preferably around Subang area. Bought it from IPC last time @ RM 369 (after 10% discount), but prefer not to go all way to IPC and not sure if they still have the same discount.

*Looking for 12kg one because I have two puppies and they can finish it in 3-4 months.

Also, any recommend dog food to change after they reach 12 months?

Thank you so much in advance for any advice.