It occurs to me that there is a reasonable prediction of ID or special creation. That is, that animals would only be as similar as they "need" to be. They would have loner legs to run, fangs for a carnivorous diet etc. They would not however, be any more similar than that.
They would show the same or less similarity as there is between placental and marsupial forms. Only "skin-deep" in a way of speaking.
In this view the existance of marsupial and placetal forms can be taken as a suggestion of support for the ID idea. However, since humand and chimps do NOT follow the convergent pattern they do NOT exhibit support for the ID suggestion.
They should be just as different internally as the thylocine and the wolf are. Their brains should be organized at least as differently as ours are from the birds (especially the corvids). However, they are not.
Clearly this hints that, at best, the marsupials (as a whole) are a "kind". While the placentals are another "kind".
The IDists don't have to thank me (which they may not anyway
) they just have to try to manage a little of their own reasoning of a similar (but not identical type ).