What is the difference between a tzatziki dip and an Indian mint dip? Aren't both just yogurt and mint? Or o is the difference that tzatziki also has some cucumber in it? Also, while tzatziki looks predominantly white Indian mint dips are green throughout, so do the latter have some natural color. What's the difference between how these two dips are prepared?
EDIT: I'm talking about the dip on the left in the picture below (which is served in many Indian restaurants with papadums as a starter dish). From the Wikipedia entry for chutney, a chutney may be a yoghurt, cucumber, and mint dip (is this what this is?).
Just for the reference, here is a tzatziki sauce I've made:
So pardon my ignorance, but why is a tzatziki not a chutney? Anyways, I want to know what this papadum appetizer dip is called and how to make it. That should make my question clear enough. Thanks.
And also, what is the difference between a chutney and a relish?