Hi Michael,
While we implement a database we need to make sure the DB schema which is running in the live environments and development are not same. SO to analyse this, you have to compare the two of these database. Doing the same with manual solution may be time takes as it may take many hours to complete the comparison. So the easiest way for doing the same comparison is to choose a third party tool. But if you’ve very less size of database, then I recommend to use a manual solution first.