Find out what specifically changed on the object's records

Here is a step by step example of how to run this scenario, and find the field changes on the records via sample data.
1. Select the backup you wish to use. This can be done either from the Smart Alert report or via the Dashboard/Backup History.

2. Find the object in question (in this case Accounts) and select "Start Compare job..." 

The job begins and you are transferred to the Jobs tab.

3. When the compare job completes, click on the Object name to enter precision repair. See here for more information.

If needed, a Restore job can be initiated directly from this step as well for your convenience.