You'll probably have more success with this question if you make it a little more specific/clarify what you're asking.

Are you referring to the very first gunpowder states like the ottomans and mughals? The early Spanish and Portuguese empires? The post 1588 Dutch, English and French empires? Tactics and weapons would vary wildly over this time.

Though in very broad strokes, until the invention of rifling, the large formations of line infantry wouldn't differ all that much; gun powder weapons simply weren't accurate enough to be effective in any other manner.