Complex sentence: A curiosity of the design is that the towers have a similar number of floors (Office Tower: 54 floors, Hotel: 56 floors); the individual floor heights of the office tower are greater than that of the hotel.
Split into simpler sentences: A curiosity of the design is that the towers have a similar number of floors; the taller office tower actually contains 54 floors, while the hotel tower contains 56 floors. This is because he individual floor heights of the office tower are greater than that of the hotel.