Chloro group fungicides are more effective as per my research.

It depends on your specific needs, the target disease, and your overall approach to disease management

Both work better, It depends on the strategy of the application

Fungicides of the M group are MSI (Multi Site Inhibitors) and therefore much more effective than biofungicides. The latter have an advantage in the control of soil diseases. Conventional fungicides can bind to organic and loamy soil particles and are therefore less effective. The fungicides of the M group are clearly more effective in controlling foliar diseases.