WAT: opCmp and opEquals woes

[Fool via Digitalmars-d]

I think that some confusion is due to == is regarded as meaning 
equality while it only means equivalence.

Modifying the RGB color example: there is a natural order < on 
the red channel. Given this ordering, two RGB colors are 
equivalent if and only if their red values coincide. In this 
sense, for example, the colors (0, 0, 0) and (0, 255, 255) 
equivalent although they are not equal.