Choosing an MVVM Framework for Silverlight 4

I have used MVVMLight before in a few projects. Has anyone who has used Prism before know of any significant benefits ove开发者_如何学Pythonr MVVMLight. Or do they pretty much have the same features?

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Prism is made primarily for extensibility with some components that can be used to implement MVVM designs. Personally I think that Prism is too heavy for simple SL applications.

Check out this earlier post on the subject: MVVM Light + Unity or Prism?