We purchased an EGL certified diamond and sent it to be certified by GIA just for this comparison.
GIA graded the diamond similarly in every category except color. The color grade came back as I color, TWO GRADES DOWN from the EGL result G.
The GIA I color diamond was being presented to consumers as an EGL G color under the pretense that EGL G color is the same as GIA G color.
Customers could have bought a GIA I color for even less money than the EGL G color! This is exactly why we insist on stocking diamonds with GIA or AGS Lab reports in our store. We encourage you to read more on this subject.