UCL >>> NUS/SMU

UCL is infinitely more impressive and renown than NUS to anyone outside of Singapore, regardless of difficulty of the course itself. And at the end of the day, that is what really matters - what employers and outsiders think of your degree.

NUS/SMU is on par with 3rd tier UK unis - think Nottingham, Bristol, Warwick, KCL, and the like.

2nd tier UK unis like UCL and LSE brutally mog NUS/SMU, no doubt about that.