The main give aways are;
1. The charging icon should be in the lower left of the mini usb connector
2. There isn't any numbers on the front genuine ones.
3. When removing the 2 rear screws, the electronics will be covered with a dark red (yet slightly transparent) plastic with 2 'hana modz' security tags on top of it. Clones have black plastic stickers over it or none at all.
4. When 'firing' from off, on a genuine you can vape straight off the bat without waiting for the 'hana modz' name too disappear from the lid screen
I hope this helps
Edit: I've just noticed that on the one in question, the charging port is upside down compared to a genuine