V Look Up Formula Clarification

Can you please help me out?

I have two spreadsheets with a approx 4,000 rows in each give or take a few hundred. Ok so in the first spreadsheet "Labels" I have a barcode and a product code which were manually inputted. In the second spreadsheet "System" I have a barcode and a product code which were exported from our system.

I want to establish where the barcode and the product code are incorrect in the first spreadsheet using a vlookup function. I've tried concatenating the barcode and product code and doing it that way but it's not working out as I had hoped.

HELP!!

Attach a sample workbook. Make sure there is just enough data to make it clear what is needed. Include a BEFORE sheet and an AFTER sheet in the workbook if needed to show the process you're trying to complete or automate. Make sure your desired results are demonstrated, mock them up manually if needed. Remember to desensitize the data.

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