Please tell me the difference between 04 and 0c in S.M.A.R.T

04 04 =Start/Stop Count

12 0C =Power Cycle Count

I think the number of 04 is the same as 0c. My hard disk is so.

But I find that in many other hard disk  the number of 04 is not the same as 0c. I want to konw why.