I know nothing about re-hairing, but if you are talking about the one you "won" from me, she was originally from a UK lot, so I think she should be white hair not yellow, although there probably are noticeable difference with the body of the yellow hair & white hair Daisy Sweets?
I want to see them when you finish re-storing them!
Honestly I do NOT own the yellow hair version of DS, however from the pictures I have seen of her I would not think it looks like AJ- I think it is darker, but not a Crumpet color maybe the same color of DNW Cuddles?