I am playing with hook grip sometimes, and for me it is weaker grip than regular grip.
with hook grip I lift a smaller maximal weight,
with hook grip I can hold submaximal weight for smaller duration,
the same apply for double or single arm holds/lifts
I cannot properly grab my thumb with the other fingers, I guess I cannot reach it properly.
Is there some minimal finger length required to make the hook grip worthy? Or is it just about proper technique and skill?