White or Brown eggs---There is no nutritional difference.

qiaohe

White or Brown: Eggshell colour is determined by the type of hen that lays it. There is no nutritional difference.
White eggs are laid by white-feathered hens.
These are the most common laying hens in Canada. White eggs are usually less expensive than brown eggs.
$ s5 s. [9 h2 K, C; Q9 P$ Q8 q' |. NBrown-feathered hens usually lay brown eggs.
: {  g2 y  m! V- T! p# a: uProducing brown eggs costs more because brown hens are larger than white ones and they eat more feed.

Young hens lay pee wee eggs and older hens lay jumbo eggs;

6 \# k! o& P4 @$ XFree-run eggs are nutritionally the same as regular eggs.
6 T3 d; e/ ]2 p+ |$ f
3 C9 r9 g& \' A3 rOrganic eggs are nutritionally the same as regular eggs.
, G( e6 L* M9 y/ T
7 J  X5 K/ p. JFree-range eggs are nutritionally the same as regular eggs.
# z6 R) U4 s  l

Here is articles:
http://www.getcracking.ca/EDU/a_guide_to_choosing_eggs.pdf