I've taken out the Tokamak twins because, as far as siblings go, they really do look very distinct.

Axed the example from The Wind Singer, since it appeared to be just a male-female twin pair having Twin Telepathy without looking identical.

You know, the article may say that "fraternal twins are no more likely to resemble each other than siblings born years apart," but there is actually such a thing as this in Real Life. It's insanely rare, but it is possible for (I think) something like the cell splitting but two sets of chromosomes...or one egg, two different sperm, somehow.