Both are very good b-schools, but if you want to have a career in IT and Systems, I think you should join IMI Delhi. If you look, IMI has a good number of IT options that can be chosen as majors in the second year. You will also be one of only a few people who major in IT. Only 17% of the batch has a major in IT. Since the group is small, this could also give you an edge when recruiting. IMI has done a lot to make its name more known, and it also has one of the best ways of teaching in the country.
Capgemini, ADP, Axis Risk, Firstsource, Genpact, HCL Technologies, Infosys, Pitney Bowes, and Wiprio are some of the biggest IT companies that hire from IMI Delhi.
IMT Ghaziabad is best for marketing domain.
No matter which of these great institutions you join, your future will rest only on how hard you work.