Which among the institutes IIT Madras and IIT Delhi is better for US PHD after masters??

Hi guys iam a 3rd year ECE student day scholar at MSIT Delhi, so far my prep is going good, iam about to complete syllabus, I don't exactly want job after MTECH or MS but want to go for PHD in EECS in US for that which among these two courses would be better choice, 1st one is ICS IITM, 2nd is IEC IITD

Who has any knowledge about these courses kindly tell about how chill is grading system, profs, teaching quality, project work in both, better chances for converting masters into US PHD?