Superchips and SCT are the same. At least they used to be. SCT=Superchips Tuning. Superchips is the basic canned tune. SCT is more custom tune based. I went through 5 Star for my tune and I'm really happy with it. They're not a Ford based tuner. I think they're just more popular with Fords then the other brands. Like the GM guys like HP Tuners.
FWIW, I got the economy tune and the towing tune for mine. The MPG was identical for me between the two so I keep the towing tune in. It really wakes the truck up.