The best way to explain it, without having you try the two by themselves is that MyEclipse builds all it’s functionality ontop of WTP, which usually means MyEclipse provides more functionality than WTP. THat functionality tends to come in the form of visual designers (Struts, JSF, JSP, etc.), Database ER Designer views, Spring and Hibernate integration and other features that you can’t find in WTP (or even other commercial products).