Customer and Customer in Company Code

Hi gurus,

I want to know if there is a difference between Customer and Customer coumpounded with 0COMP_CODE in the reports?

I have a query where at the same time it is displayed the Customer and also the Customer in Comp Code but I don't see any difference between those 2. The Query is based on the Customer in Comp Code InfoProvider. What can be the reason to have both at the same time in a Query?

Thanks,

Ramona