PSA vs. CGC

Hello!

I’ve never sent a card to be graded at any company and I’m just looking for some quick advice…

I recently purchased a Terastal Festival Sylveon Ex in a PSA9 on a whim, but I personally collect CGC slabs for the look as I’m not interested in selling eeveelutions that I collect for my own personal display.

My question is…based on experience, if I were to crack the PSA9 and send the card to CGC for grading, is there a good chance it’ll also score a 9? Or higher?

My worry is that it’ll grade lower, which is naturally a chance that I would take by cracking the slab, but I’m just curious if there’s a lot of data(?) showing that the card would grade similarly at either grading company.

Thank you!