Can Fan or Vortex

was up GC growers I dont know why but I had to do this and cause my current fan is not pushing out enough air so which one do you guys think is better the CAnFan Highout version Cheap Hydroponics, Grow Lights - Discount Hydroponic Systems and Nutrients: Ca or a vortex fan Cheap Hydroponics, Grow Lights - Discount Hydroponic Systems and Nutrients: Vo dont know which one to purcase remeber Im working with 400 watts