Well, I looked at the datasheet for specific things to test for, and...
- There very clearly should be a 1K resistance between pin 8 and 9, my real chip agrees, but the AliExpress chip is OL.
- There should also be a diode between pin 9 and 7 (GND), my real chip says yes, but the AliExpress chip says OL.
I believe that's conclusive enough?
Thanks for the help!