Visual Studio => Tools => SQL Server => New Data Comparison ...
In the new window, Under "Source Database", Click on "Select Connection..."
Enter SQL DB Server name
Select Database
Click on Connect
In the new window, Under "Target Database", Click on "Select Connection..."
Enter SQL DB Server name
Select Database
Click on Connect
Check All check boxes
Click Next
Select Tables which you want to compare
Finish
You will see data difference b/w 2 DBs
