Advantages of using jython vs. jacl in wsadmin scripting (WebSphere Application Server 7+)

Facing the programming for the wsadmin scripting client I see that you can use both jacl and jython.

I've the same level of confidence with both two languages.

I'm wondering if, in the specific of wsadmin programming , there are advantages of using one language over the other; such as robustness, availability of examples or libraries for websphere administration, or something like that arisen from your experience in the use and building of this kind of scripts.

Jython is the language to prefer:

• Rational Application Developer has tooling support for Jyton (Jython editor, debugger, command completition, and ability to test your scripts against your test server inside IDE).
• WebSphere administrative console provides console command assistance; it gives you scripting equivalents of the operations you perform using administrative console in case you want to automate them. This assistance uses Jython as language.
• Even if Jacl had been the default language for wsadmin, IBM promotes Jython for future, and even provided a tool to convert Jacl scripts to Jython. Quoting from description of this tool at given link;

When selecting a scripting language, Jython is the strategic direction as the administration scripting language for WebSphere Application Server because future enhancements of the scripting language is focused on the use of Jython.