Do I grade with gamestop or no?

I’m going to send 3 cards in to get graded, one of which is a bubble mew and i’m curious to know if i should send my cards to psa through gamestop, or send them in myself to psa. If i send the cards in myself will I get my cards back quicker then if i sent them in at gamestop? or would it be the same turnaround time. I just dont wanna wait 3 months to get my cards back 😭