Cool Seats or Ventilated Seats

Hi,

Can someone help me understand what the difference is between 'cool seats' and 'ventilated seats'? I'm shopping for a new car and I keep hearing the two words being used. So, what is the difference? And which is better?

Help!!!!

I am quite confused over this topic as it is require technology knowledge and updation of information according to change in market. I am not suppose to be good it therefore I can’t answer this quest properly.