At the age of 9 I used to confuse Skittles for M&M and vice versa much to the amusement of the adults around me at that time. I think these two brands have been around for so long and I do not know which brand is better or more popular than the other. All I can say is that they both looked the same to me and just as delicious. While stopping at a gas station the other day I found a new line of Skittles called Darkside and I bought it after all it has been a while since I have had Skittles. The description said that it contained the opposite side or the dark side of the rainbow with colors like dark purple, pomegranate, forbidden fruit, midnight lime and blood orange.