Snubbull #SM200
PSA 10 sells for 12.1× a graded 9 ($463.00 vs $38.15).
PSA has given this card a ten 2.7× as often — 15.2% against 5.6%.
How CGC grades work
These are two different pools of submissions, so this compares what each grader did, not what either would do with the same card.