[mlinksva]

My assumption is like the other replies, taller is expensiver, but apparently sometimes there is a sweet spot for more height in one building, eg browsing around Wikipedia as a result of OP, the tallest building in Tulsa Oklahoma:

https://en.wikipedia.org/wiki/BOK_Tower

> BOK Tower was built for the Williams Companies, whose CEO at the time, John Williams, was impressed by the Twin Towers and originally wanted to build two 25-story replicas in Tulsa. However, prior to construction, Williams was informed that having two separate towers would require more elevators than a single, larger tower.[citation needed] The plan for a quarter scale replica was then changed to a single 52-story tower, double the height of the two planned towers.

Hopefully someone fills in a citation!