Difference between DC All In & DC All In Special Edition (From Free Comic Book Day 2025)?

I'm starting to get into the Absolute Universe, and so I looked up where to start, finding a site that lists all the related Absolute Universe comics in order to read. It starts with DC All In, however, at a different spot in the list it places "Free Comic Book Day 2025: DC All In Special Edition #1"

What's the difference between the first one and this other version?