Hello, 

To answer your question directly, yes CBSE students will write Eamcet exam. It is very tough to predict who is getting better results but as per my past experiences, the syllabus and questions are a bit directly from the style of AP board, the chemistry is the easiest and physics part might need thinking but here lies the advantage for CBSE students, the physics questions which are on thinking level are sometimes direct questions for CBSE curriculum and thus CSBE people might find the exam easy. A large number of state board students give the exam and therefore the competition is cut-throat. The better result will be of that student who has his basics clear, irrespective of his or her Board of education.

Thank You