Tyler, read the description at the bottom of both those links you have posted, they appear to be the same part number, and as far as having an element with two wattage characteristics as in the ad 950-1100 watts, not possible.
The wattage of a heating element is calculated using its resistance it does not vary once it has been manufactured. It is not a difficult job to replace the element but be extremely careful because it is hardwired and you cannot unplug it, just turning off the control switch on the oven is not terribly satisfactory as far as your safety is concerned.
The safest thing to do is to turn off the main switch on your switchboard, it is possible to have the wiring to the stove wired incorrectly and if the switch on the stove is a single pole it only turns off one part of the supply and if the connection is wrong there could still be 240 volts at the element. Also if you have earth leakage safety control at your switchboard this can also make it dangerous.
I no longer do it but for approx 16 years of my working life I was an electrical serviceman, domestic electrical appliance repairs refrigerators, washing machines stoves etc etc.
Regards Geoff.
