Difference between OMAPL137DZKBA3 and OMAPL137BZKBA3

There is a partnumber OMAPL137DZKBA3. But there is not any information about it in datasheet. I see that it is new silicon revision, but where i can get the information about changes?

Are OMAPL137DZKBA3 and OMAPL137BZKBA3 pin-for-pin compatible?

Thanks for help.