GIN is provably as expressive as the Weisfeiler-Lehman graph isomorphism test, while GCN and GraphSAGE have strictly weaker discriminative power on some graphs.
Learning convolutional neural networks for graphs
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How Powerful are Graph Neural Networks?
GIN is provably as expressive as the Weisfeiler-Lehman graph isomorphism test, while GCN and GraphSAGE have strictly weaker discriminative power on some graphs.