Compared to 4WTC
3WTC
Roof detail, note this is the building as it was built in 1931. Later additions will be added later, as a way to switch the building between then and now.
Core of mast and study of the frosted glass in the crown.
For those that have ever wondered how they cram 16 floors into the mast of the Empire State Building: they didn't. They go from 86 to "AA", "BB", etc. until they get to GG, which is now called the 102nd floor. However, there's only 97 floors in the whole tower, counting the glorified stair landings in the mast. 98 if you include a small walkway that's in the actual cone at the top.
General arrangement of mast.