They are not similar. IIT entrance exam i.e., JEE MAINS & ADVANCED is tougher than AP EAMCET as well as the competition is higher in JEE MAINS & ADVANCED.
You should visit the link below for AP EAMCET:
https://engineering.careers360.com/articles/ap-eamcet-eligibility-criteria
For JEE MAINS:
https://engineering.careers360.com/articles/jee-main-exam-dates
For JEE ADVANCED:
https://engineering.careers360.com/exams/jee-advanced
I hope my answer helps. All the very best for your future endeavors!
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