I prefer to use the DMS coords because that's how my OzRwys - and Google Earth - are (usually) set up.
But anyway, for me, both apps (notwithstanding the different formats) placed the coordinates quite close together but at a distance of about 1.5 km to the east along the highway, from Hickeys Falls.
I used GE first, to locate the place by name (it's not on any of the charts I have in OzRwys) and then matched up features to confirm and cross check.
I placed the falls themselves (just north of the associated carpark) at 312543, 1490401
Or, in our sort of lingo, approx 9nm on the 074 radial FROM YTWN.
Are those the kind of results you were expecting?
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