chicoreus superbus vs. chic. superbus problematicus

[ukasz]

Dear collectors,
I am trying to find out how to differenciate between the two: chicoreus superbus and chicoreus problematicus. I browsed through the Internet looking for photos but it didn't help much. I have one specimen from the philippines and cannot decide which one it is. I will appreciate if you share your knowledge concerning these two with me.
Cheers,
UkAsZ