I think either you are fine whomever you choose.
Myself I have chosen SGC for my grading company of choice and also for my T206 set.
I hear a lot about PSA being worth more in terms of value, myself I haven’t seen that to be the case all that much. I think quality cards bring strong money regardless of holder SGC/PSA. Sure perhaps huge super high grade ones for the reg. guys pull more via PSA but VG-EXMT+ cards seem to be pretty evenly matched IMO.
There are certainly more PSA cards at any given time on eBay that I agree with but the consistency is all over the place to me.
Just my thoughts.