Is there any difference between f:ajax and a4j:ajax?

Question

Is there any significant difference between f:ajax and a4j:ajax tags?

I know about a4j:ajax from Richfaces 4 is based on native f:ajax JSF

Answer 1

Here is more information on the differences between f:ajax and a4j:ajax: http://mkblog.exadel.com/2010/08/what-richfaces-a4jajax-adds-on-top-jsf-2-fajax-tag/