You often find that generic parts have similar numbering.
The first letters indicate the manufacturer. The 108 implies a KS0108 style controller.
Think about early logic chips. e.g. MC for Motorola, SN for Texas, ...
KS is Samsung.
NT is Novatech.
But the important trick is to realise that LCD controllers are made by 10-20 big manufacturers and possibly another 50 smaller ones.
Typed from fading memory. You just need to download both the NT7108 datasheet and the KS0108 datasheet. Compare the differences.
David.