Hi,
Great points.
The colors in the Diamond Feng Shui course are the same ones you will work with in the Quantum Colors. As Astrid mentions, the Quantum Colors course takes you deeper into the use of color by applying the color activations in exact 15 degree ranges, thus tapping into the color vibrations and the degree in time and space.
It's just a question of how detailed to you want to get with the Colors within Marie Diamond's Feng Shui school of thought.
All the best!
Kat