Heard back from Chris about the difference in BB design on my newer frame. This is what he said:
"Hello
Yes ,we use one complete BB instead of two separate one .Both works
Chris"
I asked him if that is a general design update on this frame. But no reply, yet. Judging from my experience so far with VB, I have no reason to doubt him.
Frame weight on the new frame is identical to the old one. 1260g for a size XXL, painted.
My take on this is this: We all know these cheap frames are not monocoque but rather several pieces joined in a tube to tube construction. This and the usual lower grade carbon (T700/800 instead of High Mod T1000/1100 stuff) makes for the higher weight. I think, they just used a different BB on this one. Be it, because it was all they had lying around at the time or be it because they changed the design to avoid misalignment issues. I dunno.