^ +1 on everything he said.
Heres some good reading from MSRs website (one of the biggest names in backpacknig stoves)
Propane (C3H8)
Sea level boiling point: -44°F/-42°C. Of the three types of common LPG fuels you’ll find in the camping section, propane provides the highest vapor pressure and therefore the best cold-weather performance. And while that’s a good thing, pure propane requires a much heavier canister to safely withstand that high pressure. This is why lightweight canisters often use a mix of propane and either butane or isobutane.
Isobutane (C4H10)
Sea level boiling point: 11°F/-12°C. This is the next best thing to propane. Isobutane shares the same molecular formula as normal butane (see below), but the shape of its molecule makes isobutane far superior in terms of vapor pressure. Again, high vapor pressure translates to better performance. Isobutane is also a more expensive fuel to source and process than butane, so you’ll usually find it in the higher-quality canisters.
Normal Butane or “N-butane” (C4H10)
Sea level boiling point: 30°F/-1°C. Butane lands at the bottom of the heap. It is the cheapest and poorest-performing fuel on the list. It delivers the lowest pressure and therefore the worst stove performance in many conditions. If you’ve ever wondered how your favorite big-box store can sell fuel canisters at such a bargain price, it’s often because those brands use 100% n-butane. But here some marketing honesty is important: If you only camp in warm weather and for short periods, you can likely get by with the performance n-butane offers.
The fuel that the stove you posted runs on is is a mix of 20% propane and 80% isobutane.
