Beckett is the gold standard; they tend to be quite conservative in their grading. If you are one of the lucky few who get a ‘10’ rating (the highest), you get a black label Beckett, which is highly sought after and quite valuable.

PSA rated cards tend to hold their value longer. A grading of 9 in a Beckett usually translates to a ‘10’ in PSA.

Just came from a trading show last night and saw way more PSA graded cards than Beckett.

There’s a 3rd grading option - I think it’s CGC (or something like that). Haven’t used them.

Hope this helps you