I want to know the difference between serviced apartments and office buildings.

Hello, I'm glad to answer your question:

Serviced apartment: an apartment that provides hotel-style management services. It integrates multiple functions of residence, hotel and clubhouse, and has two functions of "self-use" and "investment", but its essence is still an apartment, mainly for people to live in.

Office building: it is another name for professional commercial office building. Strictly speaking, office buildings can't be used by people.

I hope I can help you, thank you!