The advantage over the Aussie ones may be that Marlin will be a pie..The under performance of Barrimundi compared with the index may be that the Index funds are commodity based and most would include the big companies. Fishers are small company long term investors. Again with Barrimundi the advantage is that it is a PIE exempt from the Foreign Investor limitations.
(Hold all Fisher products also AFI now outperforming in Aussie)