What is the overlap between the carjacking statute and the robbery statute?

The carjacking statute itself reflects the overlap between carjacking and robbery. It states, "This section shall not be construed to supersede or affect Section 211. A person may be charged with a violation of this section and Section 211. However, no defendant may be punished under this section and Section 211 for the same act which constitutes a violation of both this section and Section 211." ( 215, subd. (c); see People v. Ortega (1998) 19 Cal.4th 686, 700, 80 Cal.Rptr.2d 489, 968 P.2d 48 [ 215 permits multiple convictions of carjacking and robbery based on the same conduct, but prohibits multiple punishment for the same act].)