I just picked up the 2TB SX8200 on a $199 sale at Best Buy. I read that ADATA is replacing, free of charge, the slower SM2262G controller units with the faster one if you reach out to support and request it, so I decided to take the chance. Guess they don't want any more bad press than they already got with their swapping shenanigans.
Hooray! It's got the older/better SM2262ENG controller. Not sure of the NAND yet as I won't be hooking it up until I get my PCIe to NVMe adapter to mirror my current WD 500GB. It matches pics of the older/better Micron memory as the chips just say the below but I could be seeing stock photos so, who knows. I'll find out when I do the swap in a week or so, and post benchmark tests.
ADATA
60078947
5304011314
121814071172007