aim vs asx, page-2

I don't think that is exactly true, the pound has been beaten down in recent weeks/months, so do your maths again with the pound at A$1.42 - A$1.47 and it is roughly equal.
That said, there is good reason why AIM might be trading at a premium:
- the European energy problem is better understood in UK/Europe
- the newer investor base is over this side of the world (I'm in London)
- higher volumes/more interest on AIM for this stock
- some decent UK press/coverage on the stock

Overall a bit more pent up demand for the stock on AIM, which I now find indicates the direction the ASX listed shares might head in the following day.