Enterprise-wide process harmonisation initiatives require the analysis of commonalities of existing business process models. That is, correspondences between activities are identified, such that the behavioural equivalence of the models can be assessed thereafter. Due to refinements, these correspondences can relate sets of activities to each other, i.e., there are complex 1:n or n:m correspondences. In this paper, we discuss how notions of behaviour inheritance can be applied in this context. In addition, we elaborate on how structural information can be leveraged to identify violations of behaviour inheritance.