Here is how to identify fake from original:
1. Original handle is made of pure copper and the head is aluminium, while the fake is aluminium all over. Also, the handle is only painted with "copper like" paint.
2. Original has more weight (more heavy duty) than the fake ones.
3. The names PRIMUS or ORGAZ have a different font on both of them.
4. The original ones do not come packed nylon, transparent pack, but in boxes or cartons.
5. The original ones cost more compared to the fake ones, unless if you are buying in wholesale, or directly from the factory .
6. The fake ones produce smoke while cooking due to minimal oxygen entry due to the small air hole.
7. Fake burners turn black within the first week of use, become loose and sometimes regulating the flame is very difficult.