Difference between Global Recycled Standard (GRS) and the Recycled Claim Standard (RCS)?

What are the main differences between the Global Recycled Standard (GRS) and the Recycled Claim Standard (RCS)?

The RCS and GRS are the same, except that the GRS being a more rigorous standard; in the GRS, there is a higher minimum content percentage (50%) and additional processing requirements that must be met (social, environmental, and chemical).