I have both right now. A 7 foot northern pine, a 6.5 foot male snow bull, and a 6 foot normal bull female. Generally, in my experience, they are extremely similar. Some animals are very clam and will always be, some are always a bit defensive, and do the whole hissing nonsense.
My pine is extremely cage defensive, and will not hesitate to bite, my bulls are both extremely calm snakes, no issues with them.
-Mike