Senecio kleinia Instead of Tylecodon

Not knowing what a plant is should not bother me. Just because you don't know what it is doesn't mean you can't grow it. But I do have this streak in me that tends to keep me up until I figure something out. Well, that possible Tylecodon wallichii is now a most likely Senecio kleinia. I think the telltale sign is the markings on the stem.

What Is This? Possibly a Tylecodon wallichii...

Tylecodon wallichii is the thought right now, but even if it is, this plant is real young or it is a cultivar. More research into this is warranted... regardless it seems to be a fast grower. Here is a picture shortly after I initially brought it home (purchased at Once Again on our last trip there a few weeks back).