Well, fuels are fuels. For most of the canister fuels we use backpacking, they are byproducts of the petrolium industry. These used to have no use beyond fuel because the processes involved in converting them to something differnt costs as much, or more, than using the byproduct...this is and has been changing over the last 30-40 years.
Anyway, isobutane, butane, and [rppane seem to be rather standard these days. We can look to these as continuing in the near future, minimally. They allow us to use very efficient stoves. And debate minor variences in fuel mixtures. MAPP gas is slightly better as a fuel. But, canisters would also need to be slightly heavier. A no-win situation.
So, As Jim was saying, there is only marginal differences in blends. I believe that canisters have reached a limit at the current technology. You will not do much better than a 1 to 1.5oz stove and a 4oz canister of fuel.
Unfortunatly Alcohol(as a fuel) and Canisters are withn about 10% of each other.
110g(gas) is 3.8801oz
104g(can) is 3.6685oz
Total is 7.5486oz
At 1312.5/oz this gives us a total of heat of 5092.63125BTU per can. Dividing by the total weight we get about 674.6458BTU/oz.
For the same weight of 7.5486oz, we need a 1oz bottle to carry 6.5486oz of alcohol.
Heat of alcohol is only 12000BTU/lb or 750 per oz. We get 4911.45BTU for the weight or 650.6438BTU/oz.
Note that this is minimal even IFF you use the entire 4oz conister on a single outing AND you don't use a heavier stove than 1.5oz. Alcohol stoves are typically lighter. Esbit has slightly more heat at ~13000. You can crunch numbers for this if you are really interested. WG is much higher, but the stoves weigh a lot more. Kerosene is about the same as WG.
The point of all this is that it doesn't really matter. Heat sources for camping have about bottomed out using standard fuels. Roger, Jim and others have shown several methodes to use canisters in cold weather. Liquid water, albeit cold, inverted canisters, warming mechanism (wires and bars) preheat tubes, and, other methodes have been used succesfully.
What is needed is a better material for higher pressure canisters allowing better fuels. Hydrogen gas is a VERY good fuel source, but requres a very strong and expensive canister. Or perhaps a much stronger battery to generate electrical heat...