You're not getting an answer because there is no answer. No one is really contributing the information and no one person is buying a ludicrous number of B: D's from each brand to provide a decent sample. There's just no organised information particularly on the SonoKong end of things - I don't know off the top of my head if any "good molds" of B: D have come from SonoKong Phantoms (though I haven't been paying much attention, so I don't really know at all).
As with anything, it's likely random chance, but I'd suggest checking to see if any recorded "good" B: D's have come from SonoKong phantoms, and if there are none recorded, probably get Takara's if that's what you're after.