As soon as you have at least 2 Audits, a ‘Compare Audits’ feature becomes available, under the section ‘Website Audit History.’

This allows you to select any two Audits and compare the data analyzed.

The ‘Compare Audits’ button will initially be dulled out and unclickable – you need to select the two audits you wish to compare by ticking the ‘Compare’ box, at which point you’ll be able to click the button to run the comparison.

This will take you to the Compare Audits tab and auto-fills the drop-downs with the two Audits you previously selected. This contains data from the Reports and Hints sections from one Audit to the next and shows the change as a percentage increase or decrease.

You can also compare audits by heading to Compare Audits section in the top navigation:

Then you'll be presented with a screen that allows you to pick any two Projects, and any audit from within each Project:

Once you hit 'Compare Audits', the results of the comparison will show underneath:

At this point you can scroll through to analyse all the results from the different reports (toggle 'Hide not changed' to make this easier), or export into CSV format to view in a spreadsheet.

If you wish to dig into specific results, you can click View alongside any URL total. This will open up a separate Sitebulb window showing the specific URL List for the audit. Also click the View button for Audit 2, then you will have two windows that will allow you to compare side-by-side.

If you are working on a computer or laptop with a smaller screen, the side-by-side view might be a bit tricky to comprehend. If this is the case, instead do 'Ctrl + Click' on the View button:

This will generate a 'single pane' view, that allows you to easily jump between Audit 1 and Audit 2: