Who would win?

I need you to read this, someone lied to you and here is the refuttal:
A)For the last time human species dont exist because Humans are a species. And no they are not as neotenic is only unique to Humans, not Neanderthals. Heck, the skull of a Neanderthal shares more traits with the skull of an adult chimp while the skull of a Human shares more traits with the skull of a baby chimp, confirming neoteny to be unique to Humans. And no, thats not how you determine species. Species are determined by genetics morphology. Humans dont have brow ridges, your making things up, and for the record Caucasians have Nesnderthal genomes, hence why the have some neanderthal-like features.

B)Studying fossils can many tiems identify behaviours in extinct creatures. Differences in size for sexes dont dictate monogamy since thats a feature all great apes have. Monogamy was indeed ancestral in hominins (eg: Ardipithecines), however some species csn develop behsviours unusual to those of its close relatives. Lions for example live in groups despite cats being generally solitary. Neanderthals wjere confirmed to be promiscous after fossils found that they where competitive for mates, meaning they did not mate for life:
https://www.sciencedaily.com/releases/2010/11/101103081915.htm

This also confirms rhey where more aggresive. Evidence also found that the Neanderthal genome causes humans to become more aggresive, promiscous, and depressed. Confirming this behaviours to common in Neanderthals: https://www.newsweek.com/neanderthal-dna-makes-people-more-aggressive-677733

C)Lions are closer to leopards than to tigers. Several phylogenetic studies have confirmed this: https://www.researchgate.net/figure/Evolutionary-history-of-the-great-cats-A-Species-tree-of-the-genus-Panthera-estimated_fig1_318566394

This has nothing to do with the meme, but I'll address your points anyway:

A. Sharing traits is meaningless, traits are developed according to evolution due to environmental factors. There are two species of birds that look almost identical, but they have completely different genetic lines. The only thing that matters is mitochondrial DNA to determine if they are related.
https://en.wikipedia.org/wiki/Brow_ridge please educate yourself.

B. Studying fossils can't identify behaviors. Fossils are the preserved shape of bones or bodies found in the dirt. Very little can be taken from them except their structure. Every once in a while they find fossilized stomach contents that show what they ate. Monogamy can't be determined by fossils, sorry. Competition for mates does not mean they are not monogamous. All species compete for mates. You can't tell promiscuities from a finger bone. There are a hundred reasons why the finger bone could form like that, one of which is the chemical your article cites.
Your article even says that its correlation data and you have to be careful because there is no direct evidence of it until they find the actual genes and figure out how they work.

C. Being closer to something doesn't matter. If they can all breed and make eternally fertile young, that's the same species. The best way is to check the genetics (Mitochondrial DNA).