I recently bought a extra one of these just so I don't have to rely on the only one I have.
First off the difference between the old ones and the new ones is the plastic. It has This new glossy smooth plastic. when I put a new York fat on it it would not click on, thus leaking paint everywhere.
I personally think if I am paying 1.95 for a piece of plastic then it should work, but after the leaked paint dried then it started to work.
These markers are gnarly @$$ f*ck. They are a dye type of marker so if you want some more opaque get the non dye version. I honestly love these more than the other version based on how it turned a sign white after the buff attempt . good looking out artprimo