I've never heard the Sophia II, but the technical descriptions I've read of the changes seem pretty minor. They're still using the same Focal inverted dome tweeter, but with some new modifications to reduce its distortion somewhat.
I disliked the Sophia because of its whitish, grainy treble.
Same can be said about Wilson System 7 and 8. They look very similar on paper, but sound very different.
I peronally hated system 7 - I was very "hot" sounding to my ears, esp. in the treble - but I have to confess that the new system 8 is very listenable.
Prolly same can be said about the Sophia 2, since once properly broken in (they require 400h or so), they DO NOT sound "whitish" or bright at all.
And that comes from an ex-Avalon Eidolon Vision owner, which should tell you a lot.