...do the scores take into account both NGC & PCGS or just NGC?

I read the previous post about the 1989S UC Jefferson Nickel. I will admit right up front I haven't studied how NGC comes up with their point totals, or even have read any instructions on the registry population reports lately.

So I'm wondering, does NGC take into account just NGC graded coins, or do they add both NGC & PCGS totals??? One reason I ask is because we can put either company's coins in our registry and signature sets.

I went to the PCGS web site, and found out they have graded 57 1989S Jefferson nickels in PF70DC, which is almost 4 times as many as NGC. Does this make any difference?

Love to hear some feedback.

Since we're talking about nickels, a pic of my favorite nickel, the L&C bison proof.