The high number of nets with known topologies is a good indicator of the quality of our clustering algorithm. Yet, since it partly relies on heuristics, it should not be considered failproof. To assess its validity, CrystalNets.jl exports both the input and the detected net in VTF format, which can be superposed in a molecular visualisation software to check the correspondence between the vertices of the nets and the expected clusters. We manually checked this correspondence for hundreds of structures with both known and unknown nets, to assert the validity of our implementation. belief that the vast majority of unknown nets encountered in CoRE MOF are not the result of a wrong clustering by CrystalNets.jl, but simply missing from the databases we use, probably because they occur on only a handful of actual structures. On the other hand, the proprietary databases of ToposPro appear to include many such nets. We compared CrystalNets.jl and ToposPro, accessed through its online TopCryst interface, on a selection of MOFs common in the literature. The result, presented on Figure , shows that both usually return the same topology if it is in the RCSR when using the "single nodes" or the 'all nodes' clustering options. On the other hand, the "standard" clustering leads to different results in several cases. This comes from the difference in clustering heuristics: our implementation regroups each paddle-wheel into a single SBU and removes SBUs made of a lone oxygen (while bonding their neighbors together) while ToposPro does not systematically do so. These two heuristics can be individually toggled off in CrystalNets.jl by the user if necessary. In practise, we observe that keeping these heuristics usually leads to less clusters without loss of chemical meaning, which can in turn help identify relevant underlying topologies, like the xbi net for MOF-801 and UiO-66 which contains the information on connectivity between individual metal atoms and with organic linkers. Having access to other clustering options, like "PE" also allows considering alternative topological descriptions of the topology.