CCTM+RTM differs from machine functionalism in several other respects.  First, machine functionalism is a theory of mental states in general, while RTM is only a theory of propositional attitudes.  Second, proponents of CCTM+RTM need not say that propositional attitudes are individuated functionally. As Fodor (2000: 105, fn. 4) notes, we must distinguish computationalism (mental processes are computational) from functionalism (mental states are functional states). Machine functionalism endorses both doctrines. CCTM+RTM endorses only the first. Unfortunately, many philosophers still mistakenly assume that computationalism entails a functionalist approach to propositional attitudes (see Piccinini 2004 for discussion).