The genuine Casio  fx-9750GIII is the same, and does everything that the fx-9860GIII does, using exaclty the same key strokes, but is much less cost.  That's why NCEA students and maths teachers buy the fx-9750GIII  from come-here.co.nz  instead of the much more expensive fx-9860GIII.  NZ high schools have bought less than 50 of the fx-9860GIII from come-here.co.nz but they have bought more than 4,500 of the fx-9750G series from come-here.co.nz  

Schools that are aware of the fx-9750GIII put in on their stationery list to save parents a lot of money.

This page has more detail on the comparison of these two models, which are both NCEA approved