Hawkins also has Faust on his crew. Remember the cat Mink?
Well that already shows us that Law and Hawkins are pretty much equal because Law also has a Mink in his crew. Bepo. Both are the right hand man. Of course Faust>>>Bepo but still.
The reason Law is weaker than Hawkins is because of Drake's betrayal. Showing us that Law needed help in order to defeat the mighty Hawkins.