  This is a study of composition rule and temperature definition for
nonextensive systems containing different $q$ subsystems. The physical meaning
of the multiplier $\beta$ associated with the energy expectation in the
optimization of Tsallis entropy is investigated for the formalism with
normalized expectation given by escort probability. This study is carried out
for two possible cases: the case of the approximation of additive energy; and
the case of nonadditive energy prescribed by an entropy composition rule for
different $q$ systems.
