Ardhanari stotram

This post is about the "Ardhanari stotram" composed by Adi shankarAchArya bhagavadpAda that begins with the lines "Champeya Gaurardha..". Here are three videos of the same piece performed by different dancers..

First one is the one by Mythili Prakash and Kasi Aysola of Shakthi Dance company, LA. (See from 3:08)

The second one is by Thiruchelwam and Shivani Thakkar

The last one is by MP Jinakaraj and Aparna Sharma of Shankarananda Kalakshetra, Hyderabad.

What I found interesting was the fact that all the three choreographers chose a very similar way to depict ardhanariswara. The same stotram, the duo standing one behind the other, and even similar adavus. Several questions arise in my mind.. Is this the only way to depict ardhanariswara? Is one of these inspired by the others? Or were the choreographers totally independent in their thought process without any influence of the others' works? Thinking....!!