Hi,
I have recent got offers from the mentioned Universities both with full funding. UNC Charlotte offers about 1800 USD monthly stipend plus tuition whereas Mac offers 1200 CAD monthly plus tuition. UNC offers better financial support I guess, but Mac is quite reputable school which also I have been in contact with one professor and agreed to work with him in the subjects that i really like. Many people have suggested that I go to UNCC because it is in USA and give better offer. Now I can not make decision because joining UNCC means I will have to find a professor while there and also full time TA load in first year. In addition I am not quite sure if 1800 is that much considering living expenses in Charlotte.