What are the main differences between the Plus Touch and Supra Touch?

What are the main differences between the Plus Touch and Supra Touch?

The Supra Touch has twice the capabilities of the Plus Touch.
Supra Touch has 4 variable stages, 12 relays, and can control up to 4 zones.
The Plus Touch has 2 variable stages, 6 relays, and can control 2 zones.
Another difference is that the Supra Touch can monitor light levels, wind speed, and water usage, while the Plus Touch cannot.