These are both modern cards. Specifically they are the same card in the same auction. Lots #2 and #3. Both graded gem mint. One a 10 by PSA and the other a 9.5 by BGS.
1993 SP Foil #279 Derek Jeter:
PSA 10 - Final prices include buyers premium.: $32,816
BGS 9.5 - Final prices include buyers premium.: $4,981
The registry made someone pay $28k more for the PSA label than the BGS label. If there can be this type of discrepency in the exact same card in the same grade in the same auction, then the above doesn't surprise me at all.