Mat,
What sizes are the 2 animals? Both my individuals are around 18cms and ours are of similar age, +/- a month. One of my animals is showing a small cluster of three larger scales/ spurs amongst the adjacent ones. That specimen is smaller and usually of darker colouration.
The larger animal of mine is more brightly coloured, does not appear to have a spur cluster and is a little larger. The 'suspected female' also has a Spot rather than a transverse line at the base of the tail similar to your animal in pictures 10 and 12.
Hope this helps.
Shawn