Find Duplicate Meshes
"Two meshes that I duplicated are not considered identical. Why is that?" or "These two meshes are considered identical when they aren't."
The algorithms comparing meshes are not 100% comprehensive. The native method is sometimes too exact with how Blender manages mesh attributes, leading to false negatives where identical meshes are not 100% the same in Blender's eyes. The hash method is more approximate, which can lead to false positives.
While I do what I can to improve the accuracy of these algorithms, there will likely be inconsistencies. If you need further precision, do a manual inspection of the mesh.
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