I've made three different beer can alcohol stoves so far. The penny stove is the best design by a good margin. I also made one which is basically a smaller version of the Trangia stove. Both are small, extremely light and at least as effective as a Coleman gas stove in terms of how long it takes to boil a pint of water. There are only two disadvantages, namely slightly less convenient operation and relative fragility. I ruined my first mini stove when I stepped on it accidentally at my campsite one day.

I have no actual hands-on experience with a Trangia stove yet but they seem well made and stirdy. If they work anywhere near as well as my improvised alcohol stoves I would pick one over a Coleman any day.