Hello Abhishek,

 well it depends on your location o the center. If you have a center that is very far from your home, then I would recommend you to take the evening shift as by this you will be able to reach the center on time.

if that is not the case then the most preferred slot is of the morning as you will have a fresh mind and you will be able to analyze the questions more precisely. Moreover, you will have a pleasant sleep before the exam and hence your mind would be free.

the disadvantage I feel about evening shift is that if you hear somebody talking abut the paper of first shift, then you might get discouraged and nervous easily, and do blunder in your paper.

the paper is of the same difficulty, whichever shoft you choose,, so the difficulty level will not fluctuate anyhow

All I want to say is it totally depends on YOU. Whatever suits you better make a decision according to it.because in the end it is you who have to give the exam.

hope it helps

Thankyou