Skytower, I'm going by your figures in your website. I'm analyzing all the photos out there and judging from what I have seen in both photos and real life standing underneath the CN Tower and Sears Tower in several occasions, Burj Dubai is right with them at CN's 1465 ft Space Deck (1500 ft top of concrete) and Sears 1450 ft rooftop.
Burj Dubai's official height cannot possibly be just barely taller than the Empire State building. Look at photos of ESB from half a block away. Compare them to BD and Sears for example.
Yes Emaar is correct in it's "official" height. The question is, where do they mark the official height?
Lotta fun, lotta fun.