I'll go with alu for sure. I tried my food can pot setup with my msr canister stove and it takes a couple of minutes longer to get 500ml to a boil and uses more fuel in the proces.

Still not sure which alu pot though. I got a new trangia ul hard anodised alu but it's noticably thinner than my previous alu non-stick trangia pot. I guess this thinner alu pot wouldn't have such a good heat transfer ?

Also when i try to get a boil going it sounds sharper and higher pitched, don't know if this makes any sense to ya'all. Also tried it with my canister stove and it got me a nice rainbow colored spot in the middle of the hard anodised pot. Is this normal ?

I'll also ditch my potgrip and use one of my bandana's instead.