Eevee GX #SM174
PSA 10 sells for 3.8× a graded 9 ($325.50 vs $86.00).
PSA has given this card a ten 1.8× as often — 46.8% against 26.0%.
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.