At the very least, half of the cache is disabled. They cherry-picked a feature from the Pentium III lineup that they wanted to keep while lowering the cache to Celeron levels. It's a deliberate modification to reduce cost while maintaining desired performance.
It's not detectably customized beyond that but it's not like it's a SKU you can buy off the shelf, either.
After dropping Gen 7's PPC, both the PS4 and the XB1 were customised AMD APU, and there's no great architectural rival.