I just got the Stinger (black).... and have tried it once on a cold 7 degree, windy, ski day. Firstly, it is a shell and has almost no insulating value. I wore two layers underneath. Not enough. I needed one more layer.
I was concerned about the high collar, but got used to it real quick. and it covers the back of the neck gap between helmet and coat nicely. The inside collar has a soft fiber lining and a slight overlap on the inside of the upper zipper. So, there is comfort for the chin.
I got this for protection on wetter days, so we'll see.
I was surprised when this item was delivered to my home - it just came in shipping bag, so compact and light.
The Sidewinder, while kind of cool looking, I didn't really like the offset zipper when I tried it on...
You really have to try these coats on... they are cut somewhat trim and it can be a subtle difference between a good fit with room for layers and a fit that is too large. I am 5' 10", 210 lbs, bigger in the chest than in the gut... I got size large. Extra Large didn't fit well with the hardshell material. But size Large doesn't leave a lot of room for layers. About three layers would pretty much fill it out.
Because the local shop really didn't have the model I wanted.. I found a jacket from Backcountry thru Amazon that had about $200 knocked off the list price. I don't mind supporting my local shop, but was perturbed that they didn't have more to choose from. It was more of a climbing shop than a ski shop... so I guess the Stinger didn't quite fit their model.