Good question. I've read by other members that many like SGC for vintage, reasons include understanding vintage sets a bit better, as well as for that black outline around the card that makes the POP!
PSA seems to be recommended for modern.
PSA does bring a premium with it at auction however.
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Barry Larkin, Joey Votto, Tris Speaker, 1930-45 Cincinnati Reds, T206 Cincinnati
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