Check out this thread: “why square dance at contras?”. It’s not a MWSD vs. Contra, but rather a traditional square (the kind of squares called at contra dances vs. contra.

One comment by Bob Stein:

With the trends of modern urban contradancing (I will call it MUC from now on– thanks, Dudley, for making the difference apparent), calling has been reduced to a few prompts done a few times through the dance. This has to do with the desire of MUC dancers to focus on spins, twirls, flourishes, flirting, and a machine-like timing. To paraphrase Seinfeld: “Not that there’s anything wrong with this!” It’s just that the nature of MUC seems more oriented to providing this mechanized flow that dancers have come to expect. Square dancing demands that you actually listen as you dance. Your brain and body are engaged on a different level. I would imagine that MUC dancers would need to develop these skill sets to be able to experience square dancing with more enjoyment.