From an investment standpoint: go SGC if lower grade (A-2.5) and go PSA if higher grade (3+)
From a collector’s standpoint: SGC all the way!
Good luck James
FYI, SGC has done a great job for me over the last year on 14 of 15 submissions. They did screw one sub up and refused to admit their fault, cost me $90, I will live.
And as for PSA, I sent one submission their way in Feb 2021……… and I can’t say how they did, cause I’m still waiting for the grades and cards, No Joke!