That idea with the spire is in my opinion not very clever. If the Spire´s developer takes notice of that, he whould add a spire on the 610m tower, too (if construction continues). Then this one has no chance. And the Spire whould have the highest residence above ground. However, this one will be the tallest residential tower, and I agree with that very much, so One World Trade Center will be allowed to climb up for the tallest building in the Americas and as well a taller one than the Pento.
The design of the Pentominium is in my opinion very interesting. It´s one of my favourite projects outside of the United States, so I can´t wait to see it rising.