Acoustic tagging is not the same tool. It's very different and should be complementary when it can be used at all. The reason is that you need recievers to "record" the shark. The range is generally ~200m. You will have 0 information about where is the sharks when he is away from of the those recievers, which make it poorly informative in the case of pelagic/semi-pelagic sharks.
It is a great tool for resident sharks however, because it will give you information about the daily routines of sharks. But of no use to learn about long migrations, deep sea uses, etc...
edit : hope it don't go controversial but we did a quick recording in 2011 on a grey reef sharks - very easy sharks as they are very robusts.
This is internal accoustic tagging. One could say very invasive but we have over 12 months cool data about their roaming around healthy : )
notice how thick the skin is on females. (and the divers under us at the beginning - if I remember well it was Bill Gates. We had James Cameron the next week ^^)