SS's don't have the two stripes on the hood and trunklid (if thats what you meant). Only the Z28 and the Z10/Z11s (in 69 only) had that style stripe from the factory. The SS's came with the stripe across the header panel, and down the side of the fender to the middle of the door in 68, the bumble bee nose stripe only in 67, and the hockey stick stripe along the front and top edge of the front fenders in 69.
The RS's got a pair of pin stripes over the wheel wells in 69, nothing in the previous years and if the car was a Z28 or SS as well then the major package (Z28 or SS) stripes took precidence over the pin stripes and the pin stripes were deleted (except on some early 69 Z28's and the Z10/Z11's).