Without going to variable voltage, I don't think you'll find the experience that much different. There may be slight differences between the different types, but in all reality, it's all the same. If you were to go out and drive 3 brand new cars of the same size/style by 3 different makers, you probably wouldn't notice that much difference in the ways they drive. You press the gas, the car goes. You hit the brake, the car stops. E-cigs really don't differ all that much until you start changing the options, just like a car

You can get low resistance attys/cartos, which will make them hotter and provide stronger and more vapor and eat up more juice (hey, just like a car, the faster (hotter) it is, the lower the MPG). But if you were to go from a standard resistance single coil in one type of "3.7v" e-cig, to another standard resistance single coil on another type of "3.7v" ecig, it's probably going to vape almost the same. Just my $0.02, fwiw.