Some differences come to mind: voter participation in DE is higher and campaign cost is much lower, meaning it is perhaps a bit less about activating your supporters and more about actually getting people to change their preferences.
Volatility seems really high, too - see the recent rise and fall of the Greens. There's also a few weird turning points, like the 5% quorum that could conceivably hit the Left this season. And there's the non-fixed number of seats.
So: congrats, INWT, for the nice marketing. Let's see if you picked a good model :)