That would be interesting! I did not get any of them. For me that is not important because I don't use other pencils than the nude Chromagraphic liner for the waterline. I heard from my MUA that these should be great, so maybe they have a new, better formula. I have not use my Technakohls much: the colours I have are black (don't use black), purple (not really either), and lime and orange (what was I thinking...). I just photographed all my Mac liners because I had no idea about what I have, and was wondering the difference between Eye Kohls and Kohl Power Eye Pencils. I have only one PL Eye Liner - Night Trail - which I find hard, too.
No new formula, just new colours and new packaging. As far as the difference between kohls and kohl powers, kohl powers have extra castor oil, which make them super smudgy, and ideal for the waterline for smokey eyes, because they spread out in their own throughout the course of the day. And they blend like a dream. Plus they all have that black base, with the addition of coloured microshimmer formthe other LE shades that get released. Again, ideal for smokey eyes.