First, this is not really six cores, it is two fast cores plus four low power cores.
you’d be right if all the cores won’t work simultaneously (like A10/A10 X) but since A11 and above they do so yes your wrong
Seeing the metal scores finally a non X chip which beats the metal scores of A10X and higher of the X line
A10X’s metal scores were far ahead of it’s time beating A11/A12/A13 and finally A14 beats it and slightly more than A12Z as another poster said here