Ab the diference is that my atomizers are cheaper. They are HV, they are much better to 6 volts and they work at 7,2 volts too, but I make them in big quantities so they come cheaper to me, so cheaper to you. Regular atomizers (like those you already have) are more expensive because I buy very small quantities so they come more expensive to me, so more expensive to you. I will sell only my atomizers from now on, so anyone can buy cheaper. They have a wonderful taste and they will last much longer than what you have until now. So cheaper and better is my combination.