What is stronger? Queen's pawn opening or King's pawn opening?

Well it depends on what you want to do. King's Pawn attacks for scholar's mate and give the bishop a place to go to prepare castling. If you want to learn more about the scholars mate go to the scholars mate page. Queen's pawn opening give you attacking space though not as much as King's Pawn but Queen's pawn gives you queen's gambit. To sum up the king's pawn opening is definitely better.