I did my best to avoid the clone debate. Here is a clone but sure looks like an authentic.
Kayfun v4 Clone by Tobeco - Eciggity
I don't buy clones. The Russian 91% is 9% shorter so not a clone to me. The Kayfuns no matter who makes them are what I call knock offs and I can't support them.
I will NEVER (and you can take that never to the bank) buy a device with a logo that was not made by the original creator of that logo.