Are newer OEM catalytic converters worth less than older ones?

Hi Priuschat, I am unfortunately in the position of junking my 2007 prius, and the junker, who apparently specializes in Japanese cars, told me that the OEM catalytic converter I replaced last year is not as high worth as the older catalytic converters due to less precious metals being used in manufacturing. I can't seem to find info online confirming this. Does anyone in this community have any idea? Thank you!