I proved without a shadow of a doubt the 7X driver is different from the 9X driver, as comfy is saying. Opening post here: https://budgetlightforum.com/t/-/23851 explains it all in summary. Quick summary:
1 - 7 XML/7X beast driver: high amps, runs nice, but only XML's on aluminum
2 - 7 XM-L2/7X beast driver: amps lower and drop in short time
3 - 6 XM-L2/7X beast driver: amps comes back up - runs nice!
4 - 7 XM-L2/9X beast driver: high amps - runs nice, awesome output!