SEP Zero Day Vulnerability ( Privilege Escalation )

Hello all , It has been recently discovered about the SEP Zero Day Vunerability ( Privalage Escalation ). 

To fix it Symantec has released SEP 12.1.4 MP1 b. Now please kindly confirm that is this a delta upgrade or full upgrade ? when we do it using AutoUpgrade. 

1. Is this SEP 12.1.4 MP1 for clients only meaning important the package into SEPM or Upgrade SEPM to this version so that new clients versions are automatically added
    
2. when upgrading clients from 12.1.4 MP1 a to 12.1.4 MP1 b via Auto Upgrade is this a Delta Upgrade or Full Upgrade.

Waiting for your kind response on this. Thanks