If I am not wrong, SMU class size is smaller, and there are more chances of speaking up and doing presentation. SMU grads are highly sought after, and can you check whether they have higher average starting salary?
Is NTU far from your house? If yes, do you wanna live in hostel? If yes, what "CCAs" do you wanna join so that you can keep your place in hostel for 4 years?
Would you like to compare the course contents and syllabus for both uni?
Is SMU fees more expensive than NTU? How about the minors for both courses?
Pls do some research. I believe there are some threads on this topic in various forums. Pls do a search.