In reply to TobyA: I have made some with beer cans similar to yours but am no expert, the amount of pressure generated depends on the heat available I think, I found mine were slow to start generating pressure when filled to the top but got better as it burnt of some meths.
When I put my can inside one of these stoves
http://www.backpackinglight.co.uk/cookers-and-stoves/RD101.html
then more heat was reflected back to the can and it burnt really well once it was going, probably too well but still with a bit of yellow flame, so I only use it for travelling light and boiling water for freeze dried meals.
I have heard of people lighting a base with meths in it to heat the( can) stove up to get a better jet.
The picture of the last stove you showed and wanted the same flame may have been slightly smaller so the heat is in a smaller chanber and the flame nearer the meths.
Someone said why bother makiing the can stoves.
They are a lot lighter than trangia stoves and an equivalent in titanium will cost about £46.00
http://www.backpackinglight.co.uk/cookers-and-stoves/RB102.html