Leben is thinner than yogurt, especially Greek yogurt. I tasted it only once, and it tasted to me like spoiled milk (which is probably not far from the truth.) Nevertheless, my kids love it. They poke a straw right through the foil top and slurp it away in seconds. I don’t think you can drink yogurt with a straw.
I assume it is based on yogurt but just more diluted (possibly with milk).
I don’t think it’s more diluted, just less yogurtized