They took a pharmacy class together in medical school but sat across the classroom from each other and took separate notes. They studied separately for the exam. When it was returned, they had missed the same questions, for the same reasons. Despite these shared propensities, people who hope they can create a duplicate of, say, a lost child may be setting up that clone for heartbreak. Imagine the expectations that would be created for such a person.
Comparisons are tough enough on identical twins.
Between Diana and me, there were issues such as who got the better grade, who scored more points in a basketball game, who had more friends. But neither of us had to live with the idea that she was created to match up to the other's best features. A cloned child might not play the piano as well as the original. Or be as smart. Identical twins are living proof that identical DNA doesn't mean identical people.