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.
Brown-feathered hens usually lay brown eggs.
Producing 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;

Free-run eggs are nutritionally the same as regular eggs.

& J' W( m: d) d* F# ZOrganic eggs are nutritionally the same as regular eggs.
; E8 E( D% T4 P6 Z& B
Free-range eggs are nutritionally the same as regular eggs.
  D! k9 M2 W  l1 P7 o1 C
  u/ e+ w. R" A. U1 B. q
# l5 V' O& J. h& V2 [Here is articles:
http://www.getcracking.ca/EDU/a_guide_to_choosing_eggs.pdf
, N- z# Q$ ?7 j) q0 i3 S; E