many sources (1, 2 for instance) state that the best grip for the overhead press is the bulldog grip as it makes the moment arm between the barbell and the wrist zero.
Now let's consider a clean and jerk. I'm a noob about it and I want to clearly understood their theory before trying it.
The initial phase of the clean and jerk is roughly similar (forgive me if I'm not rigorous) to a deadlift pattern, and as far as I'm concerned the bulldog grip is not good for deadlift. Instead, many athletes prefer using the hook grip.
Now, let's focus on the jerk phase. It is not like an overhead press as the jerk, if I have understood it correctly, uses the momentum provided by the legs to lift a heavier bar. But obviously, from an anatomical point of view, the overhead press and the jerk have something in common. The final position with triceps lockout is quite similar, as shown in the following picture.
So, my question is: isn't there in this picture a non-zero moment arm beween the barbell and the wrist? It seems to me that the barbel is in the middle of the palm, and not in the low part of the palm like in a bulldog grip. So, my question is if the hook grip is good not only for the "deadlift" part of the clean and jerk, but also for avoiding wrist pain in the jerk phase.