not real clear in literature is that the 2015's come with the turbo fins as "standard" (blue 13 tooth for the outback). That helped too as its a upgrade that is already done for us.
Maybe it was a mid-year change? Better count the teeth anyway because my early 2015 i12s came with only 11. I might need that for the future if my access channel gets silted up, but the forum opinion is so pro 13 that I wondered why they weren't standard.
One thing I found that I wish I had found before purchasing was the posts about primary vs secondary stability. Search for those. They are a very interesting set of posts. I always figured wider was better for stability and it is but..... it is also the worst as well. Just depends on what is likely to cause you to tip.
May also be a hard vs soft chine issue... my i12s is an equal yard wide as the pa12 yet there is no lack of secondary (reactive) stability. My inflatable chines look way softer than the PA or Outback, and it's rock steady in even huge wakes from the side. But when I tried putting a quite high seat a la PA into it, the primary stability was lacking so I installed a medium high seat.
a wide, flat-bottomed kayak will have high primary stability and feel very stable on flat water. However, when a steep wave breaks on such a boat, it can be easily overturned because the flat bottom is no longer level. By contrast, a kayak with a narrower, more rounded hull can be edged or leaned into waves and (in the hands of a skilled kayaker) provides a safer, more comfortable response on stormy seas.
My Hobie i12s... sailboat in a suitcase! Look for it in THIS