Which opening is better, London system or queen's gambit?

Which is better London system or queen's gambit?

qg

I think london is better in bullet as there is less attack so u don't have to spend time thinking and just do your moves but in general the queen's gambit is better

The better is what you know better

Playing the London without experience with the queen’s gambit is a fool’s errand. You get a playable position that you have no hope of comprehending.

The Queen's Gambit is a far more dynamic opening, and it's arguably the king (or "queen", hah!) of all the chess openings. But it's also more difficult to play, as Black has a multitude of challenging ways to meet it. You'll want to book up quite a bit if you want to play the Queen's Gambit well.

The London is far less dynamic - but it's also easier to play. Black only has a limited number of challenging responses to it. The amount of study needed to play the London well is much less, as a result.

Pick your poison.

QG, but, if i could, indian game into catalan definitely

Queen's Gambit every time. It is strategically rich and gives rise to a wide variety of position types from which one can learn and grow. And is objectively good. And one can learn from a wide variety of GM games. Don't get me wrong here. The London isn't awful, but it's a bit one-eyed. Where does one go when one has hit a grade at which The Opponents Know What To Do? My mantra is: "Results and grade don't matter all that much: what matters is the answer to the question, "am I improving my understanding of this game we call chess game-by-game?"