AC/DC definitely has a sound that parlayed into a huge career. There are certainly some similarities in some riffs but for the most part, the songs are clearly different.
BTW, if you DO link AC/DC, give a listed to Airbourne. Also an Aussie band.
http://www.last.fm/music/Airbourne
You can hear Runnin' Wild in its entirety there. Tell me that isn't an AC/DC sound?