Autolaoder Y2JB backup for 12.60

Hi, I recently got a ps5 with fw12.60 and I am looking to jailbreak it. I watched MW (modded warfares) video about it, however he only has the autoloader backup for v12.70 and if I try to use that the console asks me to update my system software.

1. So I would like to know if anyone has the 12.60 backup file or is there any other way?
2. Whats the difference between 12.60 and 12.70?

Thanks