Aloha,
They are the same species. Even though ventricosa has a earlier published
date the correct species name is regarded as cabriti. Before the
rule-of-thumb regarded Madagascar specimens as ventricosa & African species
as cabriti. I've noticed the deeper-forms off Somalia tend to be of dwarfish
stature compared to the shallow-water specimens. Also African cabriti tend
to be lighter shaded, on the orange side of the color spectrum, than the
darker Madagascar Harps. Mind you this is a generalized observation. Hope it
helps.    Mahalo!  CHRIS:)

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