Lulzbot Aerostruder vs itworks E3d Aerostruder

Just got a itworks E3d Aerostruder and tried it out today. It seems to work, but the heat sink fan is very quiet. I currently have it set to 5 volts, like the stock TAZ 5 head. Should I bring it up to 12 volts like the original E3D V6 hotend kit?