Let's see if, for example, human beings and placental mice are indeed more similar than marsupial and placental mice, or any of these claims hold true. Just presenting a few traits and comparing them, cherry-picking the data, is not vigorously testing the concept.
"Real science" is not conducted in internet chatrooms, nor do those creationists who deny the scientific method have any role in it.
All of the questions you are asking will be addressed in the scientific literature. What we say here is not going to affect the course of science a whit, nor are the little "victories" or "defeats" of any substance.
If you really want the answers to your questions, a bit of research will find them for you. If all you want to do is tilt against big science, because it comes up with answers inconvenient to a particular religious belief, that seems such a waste of time.
Religious belief does not constitute scientific evidence, nor does it convey scientific knowledge.
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