Adam,
If you have two inch plumbing then I would go with the IntelliFlo. If you have 1.5" plumbing you can use either the IntelliFlo or the SuperFlo VS.
If your goal is to save a couple of bucks, then the SuperFlo works great. If your goal is to have the better pump, the IntelliFlo is your best bet.
The bigger the pump, the slower you can run it and still move the same amount of water.
As far as I know the control head does not move on the SuperFlo..
Thanks,
Jim R.