There is no large or distinct difference between the two.
The amount of cocoa liquor added to the compound... and very little else, although, there may be a sweetener difference leaning towards the lighter variety.
milk chocolate then white chocolate and then it's dark chocolate
You simple have to add milk to the dark chocolate to make the white chocolate.
dark chocolate
Dark, milk and white chocolate is all the same mixture. The only difference is the amount of cocoa liquor added. This is a mixture of dark ground cocoa seeds with cocoa oil.
There are thousands of different white and dark chocolate so it all depends on the brand of chocolate that you buy, but in most cases it is dark chocolate that is sweeter.
dark chocolate
Dark chocolate is just the cocoa powder with few other ingredients. Milk chocolate has more milk and some cocoa butter to make it more milky, hence the name. White chocolate is made out of just cocoa butter, hence its white appearance. :-D
White chocolate is very unhealthy. But dark chocolate is very good for you if you have a small piece every day.
Yes you do put weight on more with white chocolate than what you do with milk and dark chocolate.
Regular, dark chocolate has cocoa in it. Add some milk and it gets lighter and call it milk chocolate. White chocolate hasn't got any cocoa, which is why it's white. It can also contain milk, but that's not what gives it the color. The White comes from lack of cocoa.
white is better