From the outside, they
appear the same. Looking into the tube however...
In an ECF post in December, Professor Daffy said: "You can tell the fake* 510 attys because they have a metal washer around the wick. The real 510 attys you can tell because they have a white plastic box below the wick."
Non-Joye 510:
Joye 510:
And here is an L2 510 contrasted with the Joye:
* Professor Daffy provides an effective description of the contrast, but I wouldn't necessarily use the term 'fake.' Some 510s (e.g., the DSE510, BE510, and Q-510, etc.) are openly presented as what they are rather than masquerading as a
joyetech product.