Of course I'm speculating. It's also speculation to assume the Neanderthals imitated, badly, the technology of modern humans. Indeed the article asserts that

Of course I'm speculating. It's also speculation to assume the Neanderthals imitated, badly, the technology of modern humans. Indeed the article asserts that the humans who first ventured into Neanderthal territory did not have superior technology. So who developed better spear points? No way of knowing, really. Some genius from either group, perhaps. As for arrows... bows were not known to exist until tens of thousands of years after the time period we're discussing. Atl-atl are thought to have existed since Upper Paleolithic (30KYA) but it's now believed that modern humans were in Europe and Asia much earlier, perhaps 70K or 80K years ago. It was between 40K-30K that the Neanderthal disappeared. Cannibalism is assumed, based on tooth marks on bone. There's no evidence that it was universally practiced, however. Maybe just a few extreme cases. Or perhaps it was universal among hominids -- meat is meat.