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Quick Answer:
ws_ant is a wrapper to only some of the mbeans that provide WebSphere automation, but it is really a development tool and does not have access to the entire Jython command set that pure Jython does. It is a good tool for development servers/test server and good for simplistic application deployment using ANT syntax which developers are familiar with.
Jython as called by wsadmin.sh/bat can access the entire library of WAS configuration functions and is recommended for production. Jython can be used to deploy applications, and also change actual run-time configuration of WebSphere
Steve Robinson has been working in IT for over 20 years and has provided solutions for many large-enterprise corporate companies across the world. Steve specialises in Java and Middleware.
In January 2013, I was awarded the prestigous 'IBM Champion' accolade.
IBM WebSphere Application Server 8.0 Administration Guide
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