So what topic are you studying and at what level? Ie are we talking masters in biology or PhD in English literature? They will vary significantly and the more information you give the better the answer. As at present you could be talking about anything about those three universities
I have no knowledge on any of those three unis but if you do want help it might be a good idea to say;
1. What you want to study/research area
2. What level masters/PhD
3. If you know who your supervisor would be what your thoughts are on the supervisor
4. If you have offers what is the funding situations/entry requirements
There is much more info you could give but that would be bare minimum you would need to give to even have a chance of helping.
Also, there generally isn't an overall better university, just a better option for your particular set of circumstances. So without giving us the circumstance, it is virtually impossible to help.