There is no clear distinction between service-oriented systems (SOS) and component-based systems (CBS). However, there are several characteristics that could let one consider SOS as a step further from CBS. In this paper, we discuss the general features of CBS and SOS, while accounting for behavioral modeling in the language called REMES. First, we present REMES in the context of CBS modeling, and then we show how it can become suitable for SOS. We also discuss the relation between our model and the current state of the art.