Looks to me like the Metallurgica Motta jug on the left (~750ml). I have just recently acquired one (thanks to the better half) and have found that the spout has made a huge difference - the thickness of the leaves on rosettas just seem to be perfect.
However, on a side note, I am having huge trouble with consistency with this jug (I have the 500ml version and usually on steam for 1 latte), and similar to dannyhs question, is there a minimum amount of milk required for these jugs?
ie. do you need to keep your milk level above the top of the cylindrical portion of the jug?