 QBism: The emphasis on information in Rovelli (1996) influenced the birth of QBism (see Fuchs 1998: 3). There are similarities between RQM and QBism (Fuchs 2001, 2002  [OIR]).  One similarity is the emphasis on dropping questions considered meaningless. The second is the use of the language of information theory (Spekkens 2014). The difference is mostly in the way the subject holding information is treated. In RQM, this subject is fully naturalised: it is itself considered a physical system that can be described by quantum theory. This leads to a definitely stronger version of realism that QBism, and to the emphasis on the relational aspect of all variables. In QBism, instead, the emphasis is in the information about the world held by a single subject, taken as primary. In RQM, the information is relative information (in the sense of Shannon) that a physical system has about another system; it is not primary (see Dorato 2017): it is can be simply understood physically as a correlation between the two systems that can be observed by a third system (Rovelli 1996).