Ok, it seems the fun has just begun. 
Anyone can please make a summary of what we know about the different S922X revisions?
Are there any documents or confirmed info from the Amlogic itself we can point to?
What are the serial numbers? What are the frequency differences? What are the voltage differences? Is it for sure that there is a different hardware or could it possibly be done by a bootloader?
EDIT: What I’ve found so far:
Rev. A:
CPU serial: 290a…
A73 max freq: 1704 MHz
Core voltage: higher than rev. B?
8K decode: ?
Rev. B:
CPU serial: 290b…
A73 max freq: 2208 MHz
Core voltage: lower than rev. A?
8K decode: possibly up to 8K@60fps?
Feel free to correct me if I am wrong.