I have no intuition here, so I read the article: > They found a group of cells – called PMCs – believed to be crucial for limb regeneration in frogs and salama

I have no intuition here, so I read the article: > They found a group of cells – called PMCs – believed to be crucial for limb regeneration in frogs and salamanders – to be abundant in deer antlers as well as in the tips of mouse digits. So there's some positive evidence behind the mechanism being similar -- the same sort of cells are responsible for regeneration in deer and frogs. Which leads us to the question, how similar is this process? That was investigated by the scientists, who found that the source of PMCs to be different: > However, the researchers also discovered that the PMCs in antler-generating tissues were formed by a sharply different process to lower-order vertebrates, according to the study. The article continues in some detail as to the specific differences.