Looking at this graphic, it occurs to me that the 1,020 ft observation deck is for the lower level, and the top (3rd level) would be at around 1,051 ft, topping the outdoor ESB deck by a foot.
Here's where 1,080 ft stacks up with Vanderbilt, and the 1,020 ft deck height.
Here's 1,080 ft of box (minus setback) compared to 1 Vanderbilt.
Compared to an earlier estimate, pretty close...
