Some anecdotal experience for you:
I have superfeet cork insoles in my old race boots, and softer plastic ones in my kinder-gentler-machine-gun-hand boots. Some of it may be due to the boots, but for what it's worth, here's the difference I noticed.
The cork insoles seem to be a higher-performance insole. They are much more supportive and hold my foot in a stronger position, and allow less movement. At the time I got the cork insoles I was skiing extremely fast (eye-watering speeds unless you taped over the vent-holes in your goggles), and subjecting my feet to loads the human foot was not really designed for. The one problem I had with them was that landing big air on icy surfaces was hard on my heels.
The softer plastic insoles allow more movement of my foot and don't require any "getting used to" at the beginning of the season. They make landing air on hard surfaces a lot more comfy, are perfectly adequate for the level of performance I require these days and I still demand a lot of control and response from my equipment. The difference in performance between the two in terms of instant response and feel for the snow is noticeable, but not that much.
Bottom line: For most skiing, I think the softer plastic ones that I own would be better than the super-supportive cork ones that I own. Of course I don't know if they make less-supportive cork ones or not. Maybe the "ask the bootfitters" folk can tell you.