To obtain specific comparison information for the most common DBA specific tasks.
My way of achieving it
This is not a final script is merely an example that can be used to create something that can be used when we need to compare 2 logins, 2 database users, 2 instances and so on. The script can contain other type of comparison and this example contains only what I am used to compare most of the time. Another benefit is that provides an output that can be easily exported and filtered further in excel and provided to other people in an easily accessible format .
The output of the script look similar to this
The script can be downloaded from here