If you are interested in liberal studies, TISS is the best brand. It is unbeatable in this field. It offers diversified courses such as Rural Development, MSW Social Work, Development Studies, etc. The faculties are great and the student exchange program is so much better.
IIM Kozhikode is a management college where 70% of the students are engineers. You will not benefit by pursuing liberal studies from here. It is suggested if you aim for TISS and prepare for the entrance exam which is the TISS-NET.
In short, for liberal studies and humanities, TISS> IIM K.