Struts is an open-source product.

JSF is a specification.Comes with different implementations viz. From Sun, MyFaces..

Struts actions are tied to the Struts API

JSF action methods are implemented in Plain Old Java Objects. No dependencies on JSF framework.

Form Bean contains data and the Action Bean contains logic.

Everything is embedded in Managed Bean(POJO)

Struts creates action beans and form beans for you.

JSF uses dependency injection, the container instantiates the Managed Beans.

Struts is based on actions.

JSF has an event model that lets you react to value changes, actions.

Learning curve is more

Less learning curve.

More user base

Picking up momentum

Tiles can be used

Tiles can be used