Tim, the differences to pay attention to are the characterization data sets, the reference Lab values, ...

With what you are showing here how much difference is there compared to Gracol 2006? Sent from my ...

For the curious, here is a look at the color generation scheme of the "official" GRACoL2013 profile made ...

Not sure what you were looking at, but if you took a glance at the profile registries at color.org or ...