I completed the Substance Painter tutorial a week ago, using the downloaded model. So I am many hours familiar with that particular model. (In addition to having the original object in front of me on my desk.) You must admit they are remarkably similar ( yours and the one by Allegorithmic). And because the Substance Painter tutorial is widely known - more people than I will see the similarity, and since it appears that you used Substance Painter to create your materials, it might have been (or still be) prudent to declare in your Gallery image and in your product description, that this is a model of your own creation, and not the model by Allegorithmic.