Postgrad: LSE non business/finance degree or MSc Management for Investment Banking?

I want to break into investment banking and I was wondering if a non business or finance degree from LSE is better than MSc Management from UCL, Kings or Warwick. I heard that LSE is a top feeder into IB so if I had to choose between a politics MSc from LSE (like Economic Policy) or MSc Management from other top unis, what should I pick? I've seen MSc Management break into IB, I dont know about postgraduates in politics however LSE brand names is very respected in the city and I am stuck in between.