Cloupor Mini 50watt Vs Smok M80

[Devilstompa]

I just used a cloupor mini 50watt at 20watts and it hits a lot harder than my smok M80 would anyone know why ? I used the same coil and tank and The cloupor mini seems more powerful like my smok M80 isn't putting out the correct wattage.

 

[Devilstompa]

Ive heard Smok M65 and M80 Have Connectivity Problems from the chrome plating. Does anyone know about this ?