It could just be a minor error. CTBUH sometimes has very small marginal errors. For some Miami towers for example, they are off by an extra floor or 10 ft, but its no big deal. The highest floor was reached for 10 Hudson; there's still that slight extension or crown which is about 100'.
I came upon this. Looks like a must for any NYC fan. They need to re update it with all the new supertalls. They have One57 at least. A scale model of Manhatten 3d puzzle would be awesome.
by Voice Nature world PLUS
, on Flickr