Robert has a small 'burnt' cracked looking mark on his head between the eyes. On closer inspection the tip of his mouth appears similar. I wonder if anyone can comment as to whether this looks like a burn, injury or something else.
Meanwhile Steve has a single rust orange mark beneath the eye. He has not got any of this colour in him. What do we think?
My eyesight isn't the best but I don't see anything abnormal. They can develop a bright scale or patch of scales randomly so that may be it. A few more close ups in better light might show more.
I cant tell from your photos, but regarding the 'crack' so said about, it is most likely the onset of a shed. As for the colouration, its quite likely just a colour pigment.