I would suggest Bonea has the full version, and will exposition the hell out of it at some point in the future like a good little Talking Head.
I suspect (rather strongly) that (just like with "real" biology & reproduction) Bonea will be 50% Lash + 50% Harry... and
NOT contain 100% of either; and that the Shadow in turn only contained a tiny fraction of Lasciel's knowledge: the info most-likely to tempt one Harry Blackstone Copperfield Dresden, the utility that would make him want more of the same.
Given that Lash had *just* promised to tell Harry about his mom & about the whole Starborn thing, that's the only bit of info that I'm (relatively) certain Bonea holds.
Next-most-likely, I think, are extra info on Outsiders, and secret/confidential info on the White Council & the Black Council, and/or any other powerful magical agents moving pieces behind the scenes.
Finally... I'm pretty certain that there's some info (info Harry would consider critical) that Lasciel never placed into her Shadow. And, I suspect, there is some
false information -- things Lash "knew" and Bonea "knows" that Lasciel implanted as explicit disinformation.