I’m trying to decide if I should put the same or different pictures on the banner stands.

I am having a huge sale in my store in a couple of weeks. In addition to my other forms of advertising, I am going to use banner stands throughout the mall. I’m trying to decide if I should put the same or different pictures on the banner stands. I have my choices narrowed down to four, which is the number of banner stands that I plan to put up. I don’t know if I should choose one of the pictures or use a different picture for each banner stand. I am thinking that different pictures may attract different customers.