Hello dear

J ee mains paper one is for admission in btech course in various esteem Institutes like NIT, IIIT s and other state College and private colleges. Once you qualify jee mains you will be eligible for jee advanced through which you can take admission in IIT s in btech course.

AAT Advanced is for admission in barch. in only two IITS and for taking this exam you must have to qualify the jee advanced and to give jee advanced you need to give jee mains paper 1.

While paper 2 is for barch. Course and B. Planning in various good institutes.

So definitely you need to qualify jee mains paper 1 to be eligible to jee advanced and than you have to qualify jee advanced to be eligible for AAT Advanced.

Good luck