Welcome to the forum.
I have to admit not knowing the definitions of the terms you are inquiring about.
I kind of get the picture and I hope some can comment.
I do not do the arm across with the palm at the elbow in the Wauke.
I know many teach this at the start. I was told it was a learning posture to prevent the arm from flaring outside the body. I also know many do it right into higher Dan ranks. So perhaps someone who performs the Wauke this way will comment.
Can someone jump in and help respond to the question – thanks.
Not to detract from your question but this will explain why I am not the person to comment: