That's right, I think I understood the difference if someone can confirm that it would be awesome!
I found this page http://mustache.github.com/ , which seems to separate the mustache from Javascript and Mustache for Node.js
I think the Node.js version just uses some node tools for caching and rendering, and all that, but Mustache.js uses pure javascript, and in my case it can be done in the interface or backend.
For Node.js, I would suggest that the Mu2 version will be much faster and more efficient.
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