Ok so I have been using the mvp lately and I just decided to use a flavor and so I broke out the old ego with the ce4. I noticed I was getting more vapor with the ego with the ce4 than I was with my mvp and a protank2. Thought it would be the other way around......the ego with ce4 is running a 2.1 ohm coil......the mvp and protank is running a 2.3 coil. I get double the vapor on the smaller cheaper ego and ce4. hmmmmm just doesn't seem right to me.