Originally posted by Max. Q
Here are some links to a lot of information about apples. I didn't find anything that said that there is a nutritional or GI difference between the different colors of apples. It seems the only difference is the taste, texture, cooking advantages, season grown..etc..
The only one quote I found about green apples health wise:
Green apples act as a liver and gall bladder cleanser and may aid in softening gallstones
http://www.vegparadise.com/highestperch39.html
University of Illinois, Apples & More
http://www.urbanext.uiuc.edu/apples/
Ohio State University Extension Fact Sheet
Horticulture and Crop Science
Apples: A Guide to Selection and Use
http://ohioline.osu.edu/hyg-fact/1000/1402.html