Lisa,

Also check to see if you can see a the bumps of the hemipenes just below the cloaca. I don't know much about the smaller species but also, the males have the yellowing around their pores, which is pretty evident after about 4-5 months of age. That may help to determine whether the other one is a male or not. Also, can you tell if there are chalk sacs?
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Lisa

1.0.0 P.m. grandis (Linus)
4.3.0 P. standingi (Toby & Kona and their 5 babies)