Sir Jasra do checks essays thoroughly and guides about every aspect of the essay. It depends upon the student how many essays he is willing to write and get them checked by Sir in order to clarify his confusions. Going to him won't work if one is not ready to work/write essays outlines, intros according to Guidelines given by Sir.
I was a student of Sir Jasra and have never met the other teacher you mentioned.

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ye jo imtihan hy Kamal hy!