First is the ribbon JSK, which only has the print on the skirt, which is unusual for AP but it does make the JSK more elegant. What makes the JSK well suited to different body shapes is the bodice of the JSK, which uses princess seams and has ample shirring. The simple bodice design, with a bow at the waist and lace at the top ensures that even if you have a bust, it is not going to affect the look of the JSK dramatically. Personally, I think it is a nice JSK to wear if you have reservations about wearing a print or are more of a Classic Lolita but do want to wear something Sweet.
Next is the OP, which is long sleeved and does not have shirring. While I think it is a nice OP with a Sweet feel that seems old fashioned due to the print, it is not very versatile due to the sleeves and lack of shirring. While a replica of this OP would be nice for those who would not be able to fit into the OP, I do not think replicas are good because they copy the creative property of the brands and limit the creativity of indie brands. While I understand that it is autumn in Japan, I would prefer if the OP had detachable sleeves so it could be either long or short sleeved in order to make it something that could be worn year round.