First, it is always awkward to have anything between to and the infinitive as we were told in grammar school. Secondly, the comparison should form a somewhat sharp contrast rather than two similar but slightly different things. My example is this: "It is one thing for a person to own what he has created; it is another for him to stop others from copying it." - I teach Property Law and Intellectual Property Law in China.

First, it is always awkward to have anything between to and the infinitive as we were told in grammar school. Secondly, the comparison should form a somewhat sharp contrast rather than two similar but slightly different things. My example is this: "It is one thing for a person to own what he has created; it is another for him to stop others from copying it."