Remember about the pee game that I played as a kid. The kid who peed farthest was the winner one? Yeah, its perverted to keep mentioning it but I compared that one with the thingie that some adults have , my building tallest types. No sooner have I put my mind to rest that some Middle Eastern prince wants to build a tower thats one mile high, do I come across this new tower. Yea, you guessed it; its twice as tall.
The Ultima Tower is a conceptualization by designer Eugene Tsui and it's built around alleviating city congestion in this increasingly congested world. It's debatably attractive shape is inspired by termite mounds and, instead of trying to brave the winds as your ordinary block-like skyscraper, it slopes gracefully to a point from a 7,000-foot-in-diameter base.
The Ultima Tower is designed to provide good ol' self contained arcology living, takes advantage of renewable wind energy, has its own water supply at its base and throughout the tower, and uses reflecting mirrors to boost the amount of natural light throughout.
Main difference being, this one is just a concept whereas the other one was actually the truth.