T206 Cobb Grading
 

I have a Cobb red background with a Sov. 350 back. It has tape residue on the front as the original owner covered it with 5 pieces of tape in 1962. The tape itself flaked off but there is a coat of residue. (seller actually bought it through an ad in the back of a mag in 1962 for .75). For a card that will likely be an authentic, does it matter if SGC or PSA for value?