Well....
The CFM 56-7B , regardless of the rating has the same core; the only difference is in the software (chip setting ).
As i said before thrust is direct proporcional to N1 ( you read the RPM as a percentage of max RPM).
I used to fly 24K and 26K , as arule o thumb, in the 24K engine had lower N1 even at full rated thrust than the 26K.
So if you use derate or ATM and the resulting N1 is the same, the engines will produce the same thrust, regardlees of how you arrived to that T/O N1. I hope it makes sense.