You are not far off actually! when I spoke to Terurock and Tanii at NEC, they both didn't like some of the DOA JPN voice casting (DOA5 at the time) except Leifang, Rig, Hitomi when I asked. While for us we tend to favor the JPN voice casting aside. I think hearing a different language from each other sounds more pleasing as our native language might be too common with each other assuming.