"You have to include the weight of the stove and other stuff.
Alcohol stoves weigh very little so they're best for shorter trips.
Since alcohol has lower heat density, you need more weight of fuel per day, so as your trip gets longer, canister stove becomes best.
You should suspect any test that doesn't reach this conclusion."
Exactly my point, Jerry.
The canister stoves are an exception to the general rule when you consider the total weight of fuel needed for a trip. They are about doubled in weight for the fuel carried. There is no way around this.
My consumption is large by any standard. I need about 2.5 guarts per day.
4 cups in the morning of water boiled: 2 cups for oatmeal(6-8oz), 2 cups of coffee(8-9oz)
Nothing till supper.
About 4 cups for soup/stew, about 2 cups of cocoa after I prepare for bed.
Assuming I have to carry everything, this means a 113g container will last three days. So, for 7 full days out, I need three, 4oz canisters worth of gas + three 4oz cans. Or about 24oz in fuel or weight related to carrying fuel. At the end, I am still carrying a minimum of 12oz in dead cans, assuming I empty any leftover. Adding in for the stove, I make it about 27oz starting weight with a final dead weight of 15oz. Even using an 8 ounce can it really only saves about 5 ounces. Leaving a starting weight of around 22oz and a final weight of 10oz. Perhaps it is possibleto do about the same as alcohol with 16oz cans, but these are difficult.
Assuming .5oz alcohol/pt that means about 2.5oz per day for 7 days is 17.5oz. Since the actual fuel weight is about .8 that of water,the fuel weight is carried is about 14oz. Put in a 2oz pop bottle (being generous here and adding in for an extra cap, with filler hose) The total weight carried would be 16oz. The stove and a caldera cone: weight about 5oz. I make the total starting weight 21oz with a final dead weight of 7oz.
Assuming about .5oz/qt for my WG stove, I need about 1.5oz per day. For 7 days, I make this about 10.5oz, but the fuel density is again, around .8 for a carry weight of 8.4oz plus 2oz for the bottle, or a carry weight of 10.4oz for fuel and ~17oz for the stove. Total weight carried is about 27.4oz at the start with a 19oz final weight.
Canisters NEED a can to contain the fuel approximatly halving fuel density, you simply cannot contain the fuel in any usable form, otherwise.
Canisters and alcohol flip flop between what is best due to the step function related to canisters. Another day would show a slight edge to alcohol possibly break even. Another day would give a slight edge to canisters. I say slight because the carry weigh at the end of the trip means that this weigh needs to be considered as dead weight for the entire trip. At the end of a trip, canisters are badly handicaped by the can because they still need to be carried. Roughly, alcohol and canisters are about break even for overall efficiency but canisters hurt the pounds carried per day.
It only matters about WG because the STOVE is heavy. The fuel itself is actually the most efficient to carry. But, as you say "You have to include the weight of the stove and other stuff." This becomes the heaviest to carry.