Well, the answer is somewhat detailed and perhaps stupid. And that's not really the answer.
We decided to have an experiment. I bought several packs of tweaks, right and left, cut them into pieces, and delivered them to an unidentified group of testers. The distributed results are as follows; In a very large group of people (we did this at the science fair) the left setting decided it was okay. The basic premise is that the right tweezers are often older than the left, the caramel is not so creamy, and the cookie is chewed. Out of 100 samples, 80% preferred left-handed tweaks to right-handed songs.
Now for my real answer, there is no one !!! Read the content! They are the same. And if you have the weird new Twix left or right packaging without the right labeling, how do you decide which is the real left and which is the real right? It depends on which end you are opening. Technically if you look at the package it should be up and down.