Struts(MVC2) 1.2 & 1.3.

Different classes
Action , DispatchAction, LookupDispatchAction,
ActionMapping, ActionForm,ActionForward, BeanUtils,
Different Tag.
struts-bean,struts- html,struts-logic,struts- tiles.
Tiles implementation,filter using in struts1.2.
Last one project implementation in Struts1.2 using jdbc.

Struts(MVC2) 2.0 & 2.1

Different classes
Action , DispatchAction, LookupDispatchAction,
ActionMapping, ActionForm,ActionForward, BeanUtils,
Different Tag.
struts-bean,struts- html,struts-logic,struts- tiles.
Tiles implementation,filter using in struts1.2.
Last one project implementation in Struts1.2 using jdbc.