I am looking at the materials used, construction methods, design details, of this facade (or curtain wall) at 589 Fulton Street. I then compared those same attributes with what is posted on the 520 5th Avenue thread.
They are both well done, and quite attractive: but I can only imagine how much more time/cost is required to create an ultra high quality building like 520 5th Ave. 
Bravo to both; as they are each a great final result - but obviously at a vastly different price point.
Always some Interesting observations & juxtapositions to be found here on the YIMBY forums.
This is 589 Fulton St…
photo by 5Bfilms
Compared with 520 5th Ave.
photo by TKDV