The NT govt will put all the responses to the tender out on a matrix and choose which options will give what they perceive to be the best bang for their buck.
They will look at various things not just only the bottom dollar.
But all things considered there are already PC12's in the state operating (see EMS fixed wing out of ASP), so that sort of already does set a precedence you would have to think (rightly or wrongly).
As for the rotary component it will be interesting to see what airframe they invest their biccies into.
Best everyone takes the emotion out of it, it's just another contract. And nothing's a given until it's announced. Just remember an interim contract doesn't necessarily mean that their foot is firmly in the door for the long term contract (read careflight).