The "B" is the earlier 044 head. When I ordered those heads I orded match ported intakes. The "D" version heads do have larger combustion chambers, the head shown was the head the was repaired, due to a bent valve.
However I did not open up the combustion chambers to that extent. Also the intake runners could not be opened up, without massive welding.
Im not sure what the current version looks like, but side by side will be obvious.