Thing is, AMD doesn't offer Sony and MS a product. It's not like "here is a 5700, there is a 5800, and that's the 5600, please choose one". AMD offers MS and Sony an architecture with all its available building blocks and methodologies, Sony and MS have their own engineering teams that build their own blocks or change existing ones AMD has offered them ("special sauce") and then, in a combined effort, Sony's/MS's engineering teams and AMD's engineering teams build a custom iGPU. That's why Cerny's job is so important, he isn't a shopper going around and selecting parts like a PC builder, he is part of an engineering team that is designing an actual GPU. So it's not like AMD gives both different products, AMD provides a platform and services for MS and Sony to build their own GPU. If a console's GPU sounds similar to an existing AMD GPU because it has the same CU count, it's just a coincidence, they are different products.