I have read about:-
Active Deployment Configuration : No Activation
Feature --> Activate on Default : False
What is the difference?
The target of each setting is different:
Active Deployment Configuration : No Activation
This is a Visual Studio setting, determining if Visual Studio should activate all feature after you deploy through it.
Feature --> Activate on Default : False
This is a SharePoint setting, determining if SharePoint should activate the specific feature automatically. Only works for feature with scope Farm and WebApp. If true SharePoint activates the feature when solution is installed and if WebApp scope when a new WebApp is created