Fokker DVIII / EV wing question

[RAGIII]

On the Eduard Modeling site on Facebook someone asked why the Eduard kit came with two wings.
The answers varied from totally incorrect one represented the "Fabric" covered version to the following:
1. One wing represented the slight Variations in surface texture for a wing that is "Tin Canned" for lack of a better term. My thoughts agree here. The other was a non worn wing.

2. One wing represents the EV and the second wing is slightly thicker to represent the Modified DVIII wing. Now I have heard of internal structural changes to strengthen the wing but never of a difference in thickness!

Have I learned something new?
RAGIII

PS: I realize "Tin Canned" is a term used for Metal stress. Like I said, "Lack of a Better Term"

[NigelR]

According to the kit instructions: "There is a classic plastic kit wing, with a smooth surface with panel lines only. The second wing is newly styled model wing with bumped surface, imitating the actual characteristic plywood surface, which caused the small characteristic waves over the inner wing structure. Which one is used is up to you." So Eduard is giving the option for a smooth wing or one showing ripples in the plywood.

AFAIK the only difference in the wing design was internal.

[WD]

PS: I realize "Tin Canned" is a term used for Metal stress. Like I said, "Lack of a Better Term"

I have seen this referred to as "oil canning" as well, FWIW.

Warren D