Hello! You may find it helpful to do a search here to pull up other posts on this topic--there may be some that have the pics of the different shades for comparison.
There are four basic US Cotton Candys:
1) FF - Released w/ the others early 1983, consistently light pink; came w/ light purple comb
2) CF light pink - Released later in 1983 in corrected/upright pose (the FFs tip over and look dumpy); came w/ light purple comb (this is the one you have)
3) CF medium pink - Released Jan 1984 w/ Year 2s; came w/ light purple flower brush
4) CF dark/hot pink - Available as a MO roughly 1986-1989; came w/ light purple comb
Cotton Candy may be most produced G1 of all time (I'd say it's between her, Blossom, Peachy, and Sundance, but I'm going w/ CC), so yes, there is no doubt some variation here and there, but what I have listed is pretty reliable. Hope it helps!