After more than 15 years covering everything Apple, it’s with a heavy heart we announce that we will no longer be publishing new content on iMore and the iMore forums will be closing as of November 1st, 2024.
No. They have the exact same build numbers. And if you try to update, you'll get told you already have the latest software available.
The GM version IS the official release. This was confirmed via build number. No need/way to upgrade, you're already there.