For what it's worth, here's a much larger rendering of the
old version of this tower -- credit to Skyscrapercity India section forumer Indiansunite:
Unfortunately, I can't find any larger drawings or renderings of the new (80 floor) design. From the image we do have, it's safe to assume that the glass facade and crown is nearly identical, with only small changes at the base of the tower.
The old design of Platinum seems to be of nearly identical footprint, width, and general shape to the new tower, only differing in scale.
-Jai