Difference between RSNAST00 and RSNAST01

Hi Forum

Can you help me understand the difference between RSNAST00 and RSNAST01 ? The selection screen is exactly the same, but RSNAST01 is with bundling. What does that indicate ? Is it recommended that RSNAST01 be used if there are large volume transactions ? Is there a way to break up the documents that would be processed from the NAST table so that parallel jobs can be submitted with breakup of documents that would be processed by each job ? We have a very high transaction volume and would like to increase the output processing throughput by splitting the documents processed by each job.

Would appreciate your valuable suggestions.

Thanks!