I have subscribed to both S&T magazines for several years now (~10?) and find that up to 30% of the Australian version is content seen in a previous US version, however, the Australian version has more content per se. My subscription to the US one expires early next year and I won't be renewing but will continue to subscribe to the Australian one. This will mean there will be no overlap of content as I won't see the US one any more. Overall I will get more pages to read as the Aussie one is bigger and southern hemisphere centric, some of the US articles are very much "Uncle Sam and Ma's apple pie", which is fine if you live in that sort of flag waving society, but I don't (in many ways, we may be better off if we were
).