I have looked at both these Arolsen IRC records (the 1979 record is shown below) and would note that the main difference, apart from the individual camp numbers going up slightly, is the removal from the later document of some 41,748 deaths under the heading of Abteilung 1.
This is what Wikipedia says about Abteilung:
The Politische Abteilung was sub-divided into other five or six departments, which handled specific tasks. At Auschwitz, for example, the Politische Abteilung consisted of:
camp registrar (sometimes in conjunction with supervision of the crematorium)
The camp registrar handled the registration of prisoners when they were admitted and when they left, whether by release, transfer, escape or death. Inmate files were created, portrait photos made, physical description noted, brief details about the prisoner's life and fingerprints were filed.
The Politische Abteilung also handled the police work of the camps, again dividing up this work into specific subdivisions. The monitoring service prepared prisoner identification papers, another handled investigations and interrogations and a third handled prisoner surveillance. This included the fight against clandestine camp resistance groups, the prevention of escape. The department was known for its harsh interrogations, torture and executions and SS members of this department were feared by prisoners
Can anyone shine a little more light on this Gestapo unit and why the huge number of deaths went missing or actually looks like they were spread across the whole, as the totals are almost identical? Is the Abteilung mentioned on the 1979 report even the same thing as covered in the Wikipedia info?