my reviews of both:
smooth down shampoo:
the liquid was clear, only a tiny amount was needed to thoroughly lather my hair (maybe 2 quarter sized amounts), rinsed cleanly, had AMAZING slip, effectively removed build-up, and the only shampoo i've used that left my hair softer after use.
real control shampoo:
white opaque liquid. not as slippy as the smooth down shampoo, didn't rinse my build up as easily as smooth down, nor was it as detangling. still a good shampoo, but didn't work wonders like real control did.
smooth down conditioner:
amazing slip. when left on for a few minutes, truly made my hair feel smooth, soft, and the smell from the conditioner (which is yummy
) lingered even after thoroughly rinsing. wasn't the least bit overpowering, though.
real control conditioner:
left my hair soft (when left on for a few minutes), but definitely wasn't as slippery as the smooth down conditioner. a bit thicker formula than the smooth down. light pleasant smell, but it rinses away once product is washed out. made my hair soft, and moisturized, but didn't help too much with detangling.
all in all, i prefer the smooth down. i need slippery products, because when my hair's slippery, it's easier to blow-dry, and roller set. however, the real control line definitely wasn't a waste of money. neither shampoos were stripping, both conditioners left my hair soft and moisturized. also, the smooth down butter treat is an EXCELLENT product. i'll bet that both lines work better with their auxiliary products.
hth