Question

What is the difference between greek yogurt and european yogurt?

Answer 1

Greek yogurt is usually made from cow's milk or a combination of sheep and cow's milk, and it is strained, unlike European style yogurt that is more watery. 
Greek yogurt is a type of natural yogurt. You can find similar products in other Balkan countries as well. Moreover, only live active culture is used (yeast) and there is no sugar added, no gelatin, no preservatives, well, no additives. 
Greek style yogurt isn't the same. It may contain additives, but it differs to european style yogurt as it is strained.

Answer 2

Answer:

The reason that Greek yogurt is so much thicker and creamier than regular yogurt is because the whey is strained off of it. ... Removing that liquid is what gives Greek yogurt its denser consistency. Greek yogurt has more protein than regular yogurt.