S.no Zend 2 Zend 3
1. Doesn’t support backward compatibility. Supports backward compatibility.
2. Components are stored in a single GIT repository. Components are stored in multiple GIT repositories.
3. No availability of component installer. Introduction of the component installer.
4. Average ServiceManager and EventManager Performance. Improved ServiceManager and EventManager Performance.
BY Best Interview Question ON 22 Feb 2019