At an oral argument hearing, you can explain why, based on the information previously submitted, the appeals examiner's decision should be changed or remain the same. You will not be allowed to present new evidence.
At a hearing for additional evidence, you will have the opportunity to tell the Special Examiner about the additional evidence you wish to present, why you did not present it at the Appeals Examiner's hearing and why it is necessary for your appeal. There may be limitations imposed by the special examiner who hears the case. If so, those limitations will typically be explained on the hearing notice or in a separate letter.
What is the difference between a hearing for oral argument and a hearing for additional evidence?