assuming the grading structure is similiar (are we possibly talking bout the same bank ?!? ) - looking  at your offer ,I  most certainly have room to negotiate considering  (a) its a higher grade (b) managerial position (c) experience in a relevant position.

ofcourse its not exactly a apples to apples comparision, but the info you gave  helps. So  did u take them up on the offer or are you negotiating as well :) ??