I have a sneaking suspicion that there’s not much difference between us and them. I think they are just a unique combination of physical traits that are not so common today. I’d like to see a search of existing humans for neandertal like traits. THen using composite photography, combine all the best ones into one photograph. I bet you could “make” a neandertal out of living people in this manner.
Composite photography when we have DNA?????
You have got to be kidding!
Have you ever studied Neanderthals, or evolution? Or forensics?
DNA is pretty good evidence, while things like you suggest are so subjective they are pretty much useless last resorts.