it also seems the the female's body size might be larger also the chin is just the chin the female doesn't have the chin spike like the male she has fewer spikes on the chin the male also has more spike on it the females horns are also different then the males the female has more spikes on her jaw also
1) Nose ridge in males is more heavily defined than females. 2) Males have longer chin spikes, which tend to be bare of red scales, unlike females. 3) The spikes lining the back of the lower jaw are thicker and fewer in males than females, and females' spikes tend to be pigmented near the end. 4) Males' chest scales, horns and spikes lean closer to silver than tan, as they do for females. 5) Tiger-stripes tend to be more numerous and more clearly defined in males than females. 6) Hair/(tendrils?) behind the ears of females, whereas males have none. 7) Horns are smoother in females than males.
To be fair, a lot of those could be explained away by age/individual deviation. Except for the hair/tendrils.