My liners are the Gran Prix model. I guess they are pretty expensive compared to Intuitions, I think the retail is $300 or something!
However, as they are not a conventional foam liner (they're contain fine pieces of cork in a silcone oil, most likely some grade of PDMS oil) they shouldn't break down nearly as easily as a foam liner.
While the Intuition liners are a lot more durable than any stock liners (My Ace of Spades liners packed out super quick this summer) they do break down. If you're still growing I'd say go with the Intuitions as they are great liners (I prefer the Zipfits, but the Intuitions are also great) and a lot cheaper (I think). If you're feet aren't growing then the extra durability of the Zipfit may make them a good choice.
Anyway, its all down to what you like and what fits you so see if you can put your feet into both. I know the liners won't have moulded to your feet but its worth seeing how they feel as the Zipfit has a very different feel to any other liner I've been in; I like it, but you might hate it.
I know this is obvious but a good bootfitter is more important than any boot design, shape liner etc... so make sure you find a good one to work with you and your new liner.
