McGill and Concordia University?

I've asked this a couple of times in the past, but i would like to gather a little more information.

I'm an university student from Ecuador wishing to study in Canada next year, more speciffically in Montreal. I will apply over the next two months to McGill and Concordia universities(since they are the only two english speaking universities there) and I would like sb to give me any tips for applying there. If I'm accepted in both, which would you recomend?(I'm studying business). And what are the cons and pros of studying in them.

I have really good grades. In highschool, my GDP was the equivalent to 3.9/4. And in this(my first) year of university I have till now 3.8/4. I was the third best of a class of 100 of a very good and prestigious private institution of my country. Are extracurricullars too important?, the only ones i can recall now are my foreign language classes(french, japanese and little chinese).