Here is some info from the Scale Masters competition guide:
The intent of the flying portion of the contest is to determine the pilot’s ability to match the model
aircraft's flight performance to that of the full-size aircraft in the most realistic manner possible.
The contestant is encouraged to brief the flight judges when handing them the score sheets by
going over each maneuver and explaining exactly what the judges are to expect. This is the
opportunity to clarify the particular maneuvers the contestant has chosen. The information
provided to the judges is what they will inspect for. If the contestant says nothing, the judges
have no choice but to judge according to what they understand a maneuver should look like
based on this guide and other guides such as AMA and FAI Competition Guides.
Diagrams in the guide show that "vintage" designs should perform maneuvers differently from modern types. For instance, loops should be "egg shaped" and rolls should not be perfectly axial.