Hi,
I'm having trouble deciding

[Edited by futurefirst on May 02, 2015]

That depends on your goals.

I want to get employed in the city I study in. Which school do you think is better?

I'd suggest Singapore.

Interesting choice of programs... If you're more open, why not look at the MSc rankings in the FT and choose from there? Imperial's MSc in Management is ranked quite highly there, but there's also LBS' Masters in Management program if you're specifically targeting London.