Atmosphere vs webapp2: What are the differences?

Developers describe Atmosphere as "Realtime Client Server Framework for the JVM, supporting WebSockets and Cross-Browser Fallbacks Support". The Atmosphere Framework contains client and server side components for building Asynchronous Web Applications. The majority of popular frameworks are either supporting Atmosphere or supported natively by the framework. The Atmosphere Framework supports all major Browsers and Servers. On the other hand, webapp2 is detailed as "Lightweight Python web framework compatible with Google App Engine’s webapp". webapp2 is a simple. it follows the simplicity of webapp, but improves it in some ways: it adds better URI routing and exception handling, a full featured response object and a more flexible dispatching mechanism.

Atmosphere and webapp2 belong to "Frameworks (Full Stack)" category of the tech stack.

Atmosphere is an open source tool with 3.34K GitHub stars and 720 GitHub forks. Here's a link to Atmosphere's open source repository on GitHub.