2. Do I have a preference for canister type for my own use? When I have a choice, if the weather will be cold I would prefer the threaded canisters. I usually carry a large diameter plastic jar lid that I can put warm water in to keep my canister warmer. More on that here:
https://www.msrgear.com/blog/faq-how...-temperatures/
I've not had a problem with MSR fuel in cold weather. However, I usually take my Whisperlite if colder weather is expected. I'm not sure I've used canister gas mixes lower than 15 degrees. Most of the time we just set the stove on a pot lid.
It must not have been too cold, I was using my shovel as a wind break, but the gas canister is just sitting on the snow.
These pictures must be late winter or early spring.
This is our usual setup:
