JSF is MVC2 ?
As per my knowledge There is no MVC1 and MVC2
there is JSP model 1 and model 2 as explained in the article
JSF is in the scope of model 2
Other frameworks like JSF ?
Apple's WebObjects is a similar architecture to JSF and so is ASP.net.
Difference betwwen managed beans and backing beans ??
JSF's fine-tuned event model allows your applications to be less tied to HTTP details and simplifies your development effort.