I have had a bit of a mix up with the tins from a couple of Muntons kits, (the 'Imperial Stout' and the 'Porter') as the tins are un-labelled apart from a code number I got the tins mixed up and didn't know which was which. So I emailed muntons to ask which was which, and I am utterly baffled by their answer. "All three cans contain Stout Malt extract but depending on which kit these came from you can either make stout or porter or various beers depending on what it is mixed with" So is it just the yeast that determines the outcome? The kits come as two-can packs , I had presumed both cans contained the same contents - but may be not ? Also, why do some Kits (such as Coopers) come with one can and you have to add your own sugar. And other kits (such as Muntins) come as two-tins and no sugar is added - what is the difference ?