I'm not that familiar with how young H. cyanoguttatus appear. In general the species has smaller spots than carpintis, and more silvery/grey in color. Here are two different variants of H. carpintis. The first was sold as 'Escondido', and I think it may be a male . The second is a female 'Rio Hondo'.
'Escondido'
Oct 2013

Mar 2014

'Rio Hondo' (female)




'Escondido'
Oct 2013

Mar 2014

'Rio Hondo' (female)



