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

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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.
) y3 U# U# Q/ oThese are the most common laying hens in Canada. White eggs are usually less expensive than brown eggs.
0 x9 E- e! j* j& I% ^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.

4 V% C2 G& K* d$ iYoung hens lay pee wee eggs and older hens lay jumbo eggs;

Free-run eggs are nutritionally the same as regular eggs.
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Organic eggs are nutritionally the same as regular eggs.
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4 ^" `4 V4 R5 |4 u/ S' h; X! V8 |Free-range eggs are nutritionally the same as regular eggs.
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Here is articles:
; F- T$ ^  d* G7 |) D" `' k4 Y, Yhttp://www.getcracking.ca/EDU/a_guide_to_choosing_eggs.pdf