Well it depends on what you want. Both are -web- starters (they make easy to add jars to your classpath) that will help you make a REST API, but data-rest has a more specific purpose, it help you to expose repositories as a REST services (In fact if you see their pom.xml, data-rest depends on stater-web). If that is what you want, voila! But if you want more control over the data, controllers, validation or project structure, stater-web is your option.
