KCL vs. QMUL Watch
More about King's College London
As to the environment, QMUL is in the East End- near Mile End and Stepney- these are pretty gritty areas on a good day. Even if the facilities are good at QMUL, and I've heard there is a lot of new building going on, the area is depressing. KCL at the Strand is not drop dead gorgeous, but it's nice enough, the Union is good, the Maughan Library is marvellous, and the area's busy, but fine.
I hope this helps and good luck with your choices, it is a bit scary making them.
However, when you get to Uni you realise the real importance of subjectivity, for want of a better word. If possible, visit both Unis, both departments, both areas etc... there's no better way to test the water.
It's better than QMUL in management (and in the overall ranking)! Maybe the management course at KCL has a better reputation but the RHUL school of management is also very good!
Regarding your question.. in an academic way.. KCL is better than QMUL for sure.. In what concerns about socialising I cant give an opinion cause I have never visited KCL or QMUL..