I am very familiar with the difference. I have worked in Engineering development and testing my entire career.
What I don't understand is how you can see a random result pop up in a results database and say with certainty which type of sample it is.
If you check the link that I gave you. I already mentioned then that the codename of a qualification sample starts with a Z whereas engineering samples start with a number. I used Ryzen samples as illustration.
The codename of the chip appeared now is ZS1406E2VJUG5_22/14_N. The decoding is
Z = Qualification sample
S = Server
140 = 1.4GHz Base
6 = Revision 6
E2 = unknown TDP
V = SP3 socket
J = 64C
U = 64x 512 KB L2 + 256 MB L3
G5 = Rome
22 = 2.2GHz Boost
14 = 1.4GHz Base
An engineering sample appeared months ago. It was 2S1404E2VJUG5_20/14_N
2 = Second gen engineering sample
S = Server
140 = 1.4GHz Base
4 = Revision 4
E2 = unknown TDP
V = SP3 socket
J = 64C
U = 64x 512 KB L2 + 256 MB L3
G5 = Rome
20 = 2.0GHz Boost
14 = 1.4GHz Base