If you look at the box on the rose one:
- The '/' are different to real pig boxes (they run into the letter on one of the sides of them, on authentic ones they are spaced evenly). Another sign is if one of them slants different to the other.
- The barcode on the bottom should be a sticker, not printed on the box.
- The 'e' is different to authentic pigs (see the pigment tutorial thread for info:
http://www.specktra.net/showthread.php?t=69309).
Usually the jars on fakes (if they arent the ones that are done well) have a very thick base. They may also have very dull/cheap talcy looking product inside, and stickers on the base wth a batchcode (A14) instead of a colour name (violet/treu chartreuse) AND a batchcode.
Its tricky (at least for me) with the better ones - they can mimic authentic pigs down to the leaflet inside...