- Ansible 2 includes an architecture overhaul, new YAML parsing engine, and 100% backwards compatibility for playbooks. It introduces task blocks for error handling and dynamic includes. Execution strategies allow running tasks linearly or in parallel. Many new modules were added. - Galaxy 2 provides better metrics, role management, and Travis CI integration. It allows importing roles from organizations and individuals. The ansible-galaxy CLI was improved with features like role scaffolding and authentication.