just came back to this post, forgot about it...
i ride the nobile skim, and my comparison is with anothe rider around my weight, similar level, i was using a (bagged out) 13m fuel and the skim which has the low end of a 12m, he was on a door and a 16m crossbow, i was happily staying upwind, in three tacks he'd covered the best part of a half mile downwind...
i've also used the "old" door with a 13m speed and tbh it sucked, the kite was so slow in those winds you didn't have the option to turn it out of a lull or anything, even in downturns the kite wouldn't make it round without hitting the water and in light light winds you'll struggle to relaunch anything. i've used the 12m type 7 with the skim in the same kind of wind strength and i know for sure which was more fun. but give it to a newbie and they'll have a mare of a time
like i said before for cruising up and down in light winds the door is great, but if you really want to have **fun** in light winds, though not doing anything you'd do in high winds, the skim does that