1)
Three different interpretations are possible.
i)
as same as 1
1 doesn't use concrete examples. The subject of the sentence doesn't use them, either.
ii)
unlike 1
1 uses concrete examples, but the subject of the sentence doesn't use them.
iii)
unlike 1
1 uses concrete examples. The subject of the sentence also uses concrete examples, but the way to use them are different from the way of 1.
2)
Yes.
3)
対照的な二つの面 and 表と裏 are two sets of objects. They can be both in parataxis "対照的な二つの面や表と裏", or paraphrase "対照的な二つの面、即ち/つまり表と裏", I think.
4)
のは can't be used. It should be, for instance, そんなふるまいをするのは/したのは、彼が子供じみていたからだ/せいだ for the case. のは is for reason/cause, whereas とは is used to express the speakers's feelings/emotions such like surprise, anger or being moved.