Remember that not all the products in the Data Studio suite of tools are named Data Studio something, however they can all install into the same eclipse which just grows the capability of your single database tool with the function of each product you add into it.
There are some Data Studio capabilities that are complimentary. These are part of Data Studio Developer and Data Studio Administrator. You can get them by installing everything but the advance features during install. Sometimes folks call the complimentary tools just Data Studio, some folks call it Data Studio base or Data Studio foundation. It is basically the free parts of Data Studio. But these capabilities are really part of Data Studio Developer and Data Studio Administrator.