[RightWhale]

Neanderthals would not be any different looking than anybody else. They had stronger sword arms on average and would fight a wolf or bear tooth to tooth, but a lot of people now could do that. Their women gossiped and giggled excessively. Maybe that isn't unusual either.

[Arthalion]

Neanderthals would not be any different looking than anybody else.

They could pass for human easily enough, but they would certainly appear as a distinct ethnic group. You're NOT going to lose one in a crowd of Europeans. They could probably blend in fairly well in a modern multiracial city though.

[Rytwyng]

Neanderthals would not be any different looking than anybody else. They had stronger sword arms on average and would fight a wolf or bear tooth to tooth, but a lot of people now could do that

I seriously doubt that any modern people could match the physical strength of Neanderthal. See this article: The Neanderthal Paradigm by Dr. Valerius Geist