Comparing data between reports in webi

Hi,

I have a requirement where I have 2 report tabs in the document.

I have to list only the product id's in the 2nd report tab that are not present in the first report tab.

Both the report tabs are using the same data provider.

Currently I am downloading the report to excel and doing a vlook up on Product id's between the reports.

Is there any way that I could do it in webi itself?

Thanks,

Karthik