Here is what Rog was referring to.
10 days worth of alcohol weigh about the same as the canisters needed for the same amount of time. (boiling 2-3 cups of water for dinner) The weight savings would be in the weight of the stoves.
For chimney vs. Pressurized alcohol stoves, I agree with Tim, the cat can stoves are about the easiest to make because they also include the pot stand in the can itself.
Other factors would be the effectiveness of the wind screen, height of the pot above the flame. I have not heard comments about the effectiveness of the different stoves, so I would not think there is much difference. Personally I am not one to be concerned if it takes three minutes or five minutes to get the water boiling. I am more interested in how long it takes for the boiling water to cool down, so that I can eat dinner!
BTW Since you are making a alcohol stove, you might as well keep going and make an easy-to-make wood stove which will also host your alcohol stove.