Just a rough proportions problem. Granted any sort of mechical and crown/roof elements may push it over the height of "X", but not by a lot.
71 floors = 920 ft
76 floors = x
x = 989 ft.
So yes, this is a super tall as 300m = 984 ft. Based on the floors remaining the same ceiling height. Factor in the height due to lobby and base (looks like more than your typical 12 ft ceiling height, and what looks like an architectural tapering at the roof, and I'd guesstimate this is 1,015 - 1035 ft with 76 floors.
Point being, another super tall!