Over my many past flights aboard 757s, I have seen changes being implemented with their design. One of which was notably their refit of scimitar winglets. Although one of their most notable characteristics is the extended pointy edge on their tip, I have noticed that the inner edge of the winglet (past the wing position light) does not run flush with the aileron, unlike that of the older 757 winglets.
What is the reason behind this design exactly?
*Please note that the first 3 photos below are of the scimitar winglet and the last is of the original older design
Photo credits: First 3 photos are taken by me personally. Last one is from: https://www.flickr.com/photos/33415137@N06/6151948806