Hand finished anglage with interior angles on David Walter's watch are not found on J&B's movements I've seen.
Instead, you get minimal anglage, no real interior angles. It's a big difference. The plates are engine turned (which is nice, of course).
I believe J&B uses ebauches and old stock movements while David Walter is cutting the plates for his movement himself, a big difference.
I would put Josh Shapiro's engine turned dial work on par or more with anyone. Particularly what J&B does.
What J&B is doing is really not a comparable act of watchmaking, just my take.