Afaiu the main difference is the drying process which results in the different alkaloid profile. The whites are the most stimulating, the greens are the basic high mitragynine strains that combine stimulant and relaxant characteristics and the reds have the highest concentrations of 7oh mitragynine, which is the strongest opioid of kratom alkaloids. The golds and yellows are just blends of this 3 main types. I personally highly reccomend switching strain colors. Good white strain is perfect w