One of the criteria on mint state silver coins is whether it has pleasing toning. There are many obvious cases where a coin with MS64 dings is given a gem MS66 just for having "aesthetic" rainbow colors. That is just pure subjectivity, a Hot or Not for silver coins played for money. I don't think you'd learn anything from comparing those slabs except "that particular grader really likes rainbows and doesn't care much about dings in the fields".
As a MS63/65/67, maybe it would have some merit. But the fine granularity point differences seem completely arbitrary, as Earle has commented many times.
As a MS63/65/67, maybe it would have some merit. But the fine granularity point differences seem completely arbitrary, as Earle has commented many times.

























