Difference between JSP-EL and JSF-EL

JSP-EL:
1. JSP-EL value expressions are delimited by ${..}.
2. The ${..} delimiter immediately evaluate the given expression, at the time when the page is processed.

JSF-EL:
1. JSF-EL value expressions are delimited by #{..).
2. The #{..) delimiter is deferred evaluation. With deferred evaluation ,the expression is evaluates whenever a value is needed.