There is a difference between Seeing Clearly and Clear Seeing.
Seeing clearly means being able to see the differences between things, being able to distinguish between one and the other. This depends on sensory inputs. If your eyes have cataract, you will not be able to see clearly. What is true of the eye is true of the other sense organs including the ears, nose, tongue, skin and brain. When you understand a concept well, you can say that you see clearly.
Clear seeing is seeing the sameness in everything, despite apparent differences. This does not depend on sensory input. While sense organs provide you information to the contrary, there is the knowing that it is not as it appears to be. It is possible that a person with cataract may not be able to see clearly but he may be able to clearly see.
Clear seeing is an insight into the nature of things, into the nature of senses, into the differences, into the nature of seeing clearly.
What is better? Seeing clearly or Clear seeing? That depends.
In day to day life, people, schools, organizations and society gives more importance to seeing clearly. However, it need not be so always.
A close analogy is like the Necker cube which can be seen in two ways. There are some people who have difficulty in seeing the other perspective.
Seeing clearly can mean being able to see one or both of the perspectives. This may sometimes lead to arguments between those those who see one perspective and those who see the other.
Clear seeing can mean being able to flip between the two at will and empathize with the person who is unable to see the other perspective.