I just recently learned of a resource that shows the pros and cons of each type of adoption in a table format. The tables show the pros and cons for each group of the adoption triad. (It does not show how the type of adoption affects other parties involved in the adoption, such as biological or adopted siblings or grandparents).
PROS for each type of adoption:http://www.childwelfare.gov/pubs/f_o...lefactpros.cfm
printable version here (the pros and cons tables are one the last two pages):http://www.childwelfare.gov/pubs/f_o...ptbulletin.pdf