How do families handle differences in two adoptions?

We are in the process of adopting our second child. With our first child I would say the adoption started as semi-open. We would send letters and pictures four times a year. This continued until recently – our daughter is now almost three. Recently the birthmother asked for no more contact. Now we are in the process of adopting our second child. The family has asked for a very open adoption. They would like to see the child. They also have 3 other children and want the fourth child to know their siblings. We have not worked any of the details out and are unsure how much contact they are looking for. I know that our daughter will have many questions, she is always aware of what is going on. How do you handle the differences in openness with each child.

The second question I have is about race. We are a caucasian family. Our second child will be asian. I am just curious how adopting a child of a different race has affected the child and the family?