I never used the super 12, but had the 8x14. It is heavy and I used it primarily for fields. In my area, mineralization is thought to be high but it is really dispersed , so it's considered mild. To get a benefit over the concentric coils, you have to have pretty mineralized soil. I know out west there is a bunch and they may benifit from it. I just remember hunting in the snow with it and snow piling up on top of it....man was that heavy lol Hopefully someone that had both coils can give you a side by side on them.