Maybe... maybe not... we don't know. Only Symantec knows.
Just finished downloading the latest Full package and there is a file size difference, so something has been added.
v12.1.6860.6400 - Symantec_Endpoint_Protection_12.1.6_MP4_Full_Installation_EN.exe - 718,963,792 bytes
v12.1.6867.6400 - Symantec_Endpoint_Protection_12.1.6.MP4.Full_Installation_EN.exe - 719,656,200 bytes