Similarity of thinking, communication and behaviour makes very important part. So statues and corpses don't rank high in my value list.

You may have a point, but similarity sounds a bit less vague to me than moral significance. At least it makes some restrictions: if objects A and B differ only in one quality, and A is human-like in this quality while B not so, then A is clearly more similar to humans. If A is more human-like in certain respects while B in other, more precise description is needed, but I can't describe my preferences and their forming more precisely at the moment.