Summary
It can be useful when troubleshooting to compare a copy of a customer's data to the demo data or an old copy of their own data that doesn't exhibit the problem you're investigating.
Resolution
There are many software packages available that can be used to compare the differences between two databases, Sage is not able to recommend any particular solution. Here are some examples of the options available:
https://dbcomparer.com/ - A freeware package
https://github.com/OpenDBDiff/OpenDBDiff - Open source
https://sqldbtools.com/tools/sqldbdiff - Freeware version available
https://visualstudio.microsoft.com/vs/features/ssdt/ - For use with Visual studio