This is a hard one to answer. The reason is that you are asked to distinguish between 2 schools of thought that are very close together. Not only that, but the characteristic you are looking for is not mentioned in either description.
Since semiotics brings in many more fields of study than does iconography, then I would go with iconography. This school of thought seems content just to find the symbols according to its description. What is done with them is mentioned in the other school but is not elaborated upon.
My answer would be iconography.
Youll have to lodge the end of the sticks in the ground, you cant do it on this surface, it will tip over easily. Do it on dirt. Also get a stronger rope and tie the top through and through very well.
