Kanger T3 heads with 2 holes vs. 3 holes ???

[Vaptor]

When I got the Kanger T3 clearos they had a head with two air holes and fairly smooth threading. Now I've received head replacements
and they have three holes, threading is not so smooth and box say TABAC. So before I blast the vendor that sold me both I though
I'll ask here if anyone knows anything about it.

 

[denali_41]

i just got a shipment of the newer heads with three holes ,that is the only difference other then the older ones that only had two airholes

but no TABAC on them