That looks about right. The Kush, being predominantly Indica, will grow and bulk up much faster than the Hawaiian Snow, which is a very stretchy, stringy, very thin leaved Sativa (I have one in my closet right now). Anyway, for 9 days old, those babies ain't too bad... and I like the black tape idea, but it's really just extra work because there isn't enough light getting through the styrofoam to affect the root growth of the plant (especially since you'll be transplanting it into a bigger container fairly soon anyway, right).