In China, there are regulations concerning refuge floors. If your building is taller than 100m, fire regulations state that you need to provide one empty floor for escaping people to stop and rest(as far as I've understood it) per every 50m of height. So a 101m tower would need to "waste" two whole floors - thus 101-120(ish)m towers are avoided if possible. AFAIK there are also some other fire measures that increase construction cost if you go above 100/150m, but the refuge floor issue is the most visible one.
You are welcome to challenge this code if you know what you are doing, but most developers in China choose to go the conventional way.
Many developments are large and consists of many towers, so it definitely does have an impact:
4x110m towers=8 refuge floors needed vs
5x100m towers=0 refuge floors needed.
If the salable area is the same, which one would you choose?
