LM2940-N: Differences between families

Part Number: LM2940-N

Tool/software:

Hi, Team

     Could you help me to understand the differences between LM2940S-5.0 and LM2940SX-5.0/NOPB? we are guessing that the difference is related with the packing qty and carrier.

     Just we want to confirm that there is not another electrical difference.

Regards