<p>The “City of London” is the financial district in London, the way that “Wall Street” is the financial district in NYC. </p>
<p>Looking at various League tables, ICL ranks between 4th and 14th. If you figure that the US has 5 times as many people, and thus should have 5 times as many top schools, UCLA’s UNSWR ranking of 25 translates to 5th in the UK, really very close.</p>
<p>I still think that given the huge difference between an English uni where you focus on one thing, and the more broad education offered in the US, the OP needs to think about whether they know what they want to study, or want to explore. The fact that they’re wavering between finance and physics makes me think that the US is a better choice.</p>