Datagridview Compare

One Simple Logic which i can say is, keep both datagrid view in a both data table as dt1 and dt2, then compare both datatables. 

Hope this may helps you.  

 

Here i have pasted one link, they follows another method. But not all the times, this will works. So try with datatable as i mentioned above.

 

https://www.codeproject.com/Questions/791752/how-to-compare-two-datagridview-values-in-windows