[venomsnake]

From marketing point of view sadly the difference is huge.

Greek yogurt is pleasantly neutral as a meaning, new but not exotic, boring and safe choice for everyday use. Marketing labneh will be a lot harder - if the audience starts to view some food as ethnic and/or exotic - they wont buy it as a staple. And lets not discount the possibility of social media @#$$-storm if you somehow misspell, mismarket or whatever.

Do you want to quadruple the sales of tahini in US - rename it as sesame butter.