Duplicated work is not necessary a sign of inefficiency, though.

My hope would be that they each learned something slightly different in solving the same problem. Eventually, things may converge to a single answer. However, there is no evidence to see that we should demand the convergence at the beginning.

So, the shame here is if folks are not comparing and contrasting the different solutions to the same problem. I confess I am guilty in that I have not read both papers. But I will try to see if it can help me understand.