What is the difference with expensive eggs and regular eggs ?

brown VS white...the difference is the breed of hen laying the eggs
"organic" a label put on a product that may or may not mean anything. 
Taste is the same

Organic eggs will have laid by hens that are fed on natural feed, grains, grass etc without any additives. In the UK they must also be free range meaning they can roam about freely for at least part of the day, rather than being confined 24/7 - as opposed to battery hens who have none of the above. In the uk there are strict regulations and inspections for anything that claims to be organic.

The price.....................

They both come out of the same hole on a chicken that they poop, pee and have sex with. It`s called the cloaca. Wash it all you want, it still came out of a chicken`s butt hole. Enjoy your butt hole eggs!

Battery eggs have thin shells and sloppy whites.
Free range eggs have firm whites and tasty orange yolks. Much more healthy for us.

Nothing different imo.

idk but make sure they r free range eggs

The organic ones are always more expensive, as are free range ones.
They taste the same to me, but I'm no expert!

None. There is no difference between brown eggs and white eggs. There is no difference between expensive eggs and cheap eggs-you pay the price Only for marketing. 

Organic has more omega 3 than regular eggs. 

Organic has less chemicals than regular. 

I don’t know about taste. I think they taste the same but I don’t exactly have the best taste buds.