Which Building Is Taller?

In terms of "the building itself" it's the left one. The right one just has a spice ontop on it. So does the left one with its antennas.
In terms of "shipping space needed" the right one might win if you remove the antenna before shipping. But to prevent damages I would remove all spices from the building before shipping them.

I would say that accessories do not count to the height of the building itself. No matter if it's an electrical addition or to cheer up the facade. In that sense the left one wins.