Karen #XY177a
PSA 10 sells for 9.1× a graded 9 ($1,797 vs $197.94).
PSA has given this card a ten 1.8× as often — 6.6% against 3.6%.
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.