Regardless of whether you call it a "dragon" or not, it's still a "lizard". In common terms though you have a Mountain Horned Dragon, and what we have here is Horned Lizards. Both lizards, just different genus.

It's definitely a Horned Dragon, and there shouldn't be much debate about whether it's male or female. A good enough picture should show hemipenes or not, regardless of species. That's pretty well a constant identifier in every genus of lizard I am familiar with. Almost any keeper here familiar with sexing Horned Lizards could tell you what sex your MHD is, so I don't understand the confusion in other forums?
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"A man that should call everything by it's right name, would hardly pass the streets without being knocked down as a common enemy." The Complete Works of George Savile, First Marquess of Halifax 1912,246