Both have 83.H.0A83
First Disk Crystal Disk Mark: picture 4, 5, 6
Second Disk Crystal Disk Mark: 1, 2, 3
Imgur album with tests:
Both are still in their respective cases tested individually.
Both look fine smart wise according to stablebit scanner/WDLG
Slower one sounds slightly louder.
Thinking of running the WDLG extended tests on both.
Heres a sound clip of each. (not totally fair since one was spinning up and the other started a scan, but I think you can hear the difference. This was recorded with my phone less than an inch away for each right above the vented slits.)
First drive (faster, cooler, quieter drive), Second drive (slower , warmer (though not really an objective test, it just looks warmer from the same tests in Crystal Disk Info by a few degrees))
Additional information:As I’ve started to run a full sector scan (Using Stablebit Scanner) on the slower one its hit 56 degrees, which crystal disk info seems to say is very warm. Its stabilized at that temperature running for more than an hour at 56 degrees and isnt going higher