Ann: Final Director's Interest Notice, page-62

Yes, I imagine if two companies adopted Rose and sold identical products to the same market, then yes, you would end up with a similar product due to constant learning that Rosie does through each interaction with every customer.

Ie. The same customers interacting with Rosie in the pursuit of the same products will invariably lead Rosie's development down a similar path.

But I think the differences in products between companies mean that the same customers will interact differently with Rosie from company to company (I would assume that typically we vary our behaviour when shopping for different products). This will lead to variations in how Rosie behaves from company to company.