I'd suggest having your ETL show you how to read your business reports in depth. If you're looking for true comparables, it will show your Group results; so you can see where your store/department ranks amongst your own Group (my store has 70 stores in it's Group). Ask your ETL which stores in your Group are similar in volume, sq footage, and demographics to really gauge your competition. You can also see where you are MTD comp and YTD comp. Lots of different variables and ways to look at your numbers.
So, when I say my A&A dept is comping at 22% MTD and 7% YTD..... that is of no real value to you, comparatively speaking.