Your question is interesting.
Well, i am not the expert on this.
I guess that the best place to check will be:
However, i did some more research.
To my understanding, they are not the same thing. I may be wrong. Please check with the software comm.
Core Stepping means:
Throughout the life of a processor life cycle, the processor may go through several steppings or versions. Newer steppings typically have some type of improvement over previous steppings of the processor.
The Processor stepping is a 4-bit value obtained by copying the stepping field of the processor signature returned by CPUID instructions.
This stepping id indicated the revision of the processor family.
Now, why i am saying they are different:
I have used Intel (R) Processor Identification Utility on some different system.
I can see some CPU with a specific SL number has a certain core stepping C1 and when running this utility, it gives a stepping of 5. So this is completely different.
I have come across this document which is very interesting to understand the CPUID string fully.
All the best,
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