The proof is in the putting
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No it's not. The historical phrase is "The proof of the pudding is the eating." This translated from Cervantes'
Don Quixote written in 1615 if memory serves.
But to your point, inkjet prints on any paper, whatever the source or whatever the purpose, will not ever be silver gelatin prints. Nor should they be. Inkjet is a new media with its own look and feel. Inkjet is not wanna-be silver gelatin.
If you really want the look and feel of Kodak Endura Metallic, get thee to the darkroom. Seriously. If you really want that look, why settle for an imitation when you can have the original? It's a completely different workflow, but a workflow capable of spectacular results in its own right.