SAP refers to the procedure to clone an SAP system either homogeneous system copy or heterogeneous system copy. The differences between these two methods are as follows:
In a homogeneous system copy the SAP release, the operating system and the database version of the source system and target system all match.
In a heterogeneous system copy, one of the items is different.
The copying or cloning of an SAP system is advised in the following situations:
Install a system copy if you want to set up a test, demonstration, or training system. Likewise, SAP recommends you perform a system copy if you want to change your operating system and / or database.