1. In comparative sentences with the expression "of the two," you need to put "the" before the comparative. ex)Tom is the taller of the two boys.
2. In some fixed expressions you can also find a "the comparative" pattern. ex)all the more -->I love him all the more for his faults. ex)all the better -->He likes her all the better because she is poor. ex)the -er,
I beg to differ. The superlative form involves at least three items. When there are just two, you can't use it. Your second version leaves nothing to be desired.