Question about Gigabyte B550I Aorus Pro AX

Good day Can anyone tell me the difference between: B550I AORUS PRO AX (rev. 1.1) Rev. 110112ME-B55IAPW-1101R and B550I AORUS PRO AX (rev. 1.2) Rev. 120112ME-B55IAPW-1201RI I can't find it anywhere in the description or manual. Thanks in advance