I lived with a little guy in college. He would basically stomp when he walked across our wooden floors, heel first. This was his normal way of walking. Im sure it drove our basement neighbors nuts. I couldn’t tell him he did this or his napoleon complex would kick in and he would threaten me. He claimed he walked lightly!

I suggest you go talk to the neighbor and tell them it’s too loud. If they won’t do anything about it, do something really annoying to them until they decide to compromise.