Replying to Difference between Helbent and Ponton

So I ski the Alpes and like to do powder and park. And just jibbing the slopes and every obstacle that i come a cross. So i want a new powder ski. I have some rossi bc's from like 5 years old. Im thinking about the helbents coz they seem like the perfect powder jib ski. So i found some deals on the internet:

07/08 Helbents 400euro's
08/09 Helbents 500 euro's
08/09 Pontons 500 euro's

Whats the difference between them nd what would u suggest?

tnx