The answer to 'which is better zone control system or' is that zone control systems are generally better than a single-zone HVAC system for many homeowners. Zone control systems allow you to independently control the temperature and airflow in different areas or "zones" of your home, providing more customized comfort and energy savings.
With a zone control system, you can set different temperatures for different rooms or zones based on occupancy, usage, and other factors. This allows you to heat or cool only the areas that are in use, rather than the entire home. This can lead to significant energy savings, especially in larger homes or homes with varying heating and cooling needs in different areas.