  We consider the characterization of quantum superposition states beyond the
pattern "dead and alive". We propose a measure that is applicable to
superpositions of multiple macroscopically distinct states, superpositions with
different weights as well as mixed states. The measure is based on the mutual
information to characterize the distinguishability between multiple
superposition states. This allows us to overcome limitations of previous
proposals, and to bridge the gap between general measures for macroscopic
quantumness and measures for Schr\"odinger-cat type superpositions. We discuss
a number of relevant examples, provide an alternative definition using
basis-dependent quantum discord and reveal connections to other proposals in
the literature. Finally, we also show the connection between the size of
quantum states as quantified by our measure and their vulnerability to noise.
