Before revision:  We then expand this, and move from a distance between simplicial complexes to studying equivalences between models in order to determine their functional relatedness .
After revision:  We then expand this, and move from a distance between simplicial complexes to studying equivalences between models in order to determine their conceptual similarity. We apply our methodology to demonstrate an equivalence between a positional-information model and a Turing-pattern model from developmental biology, constituting a novel observation for two classes of models that were previously regarded as unrelated .