This is kind of the 9mm vs .45 debate, only for pepper spray. They both have their advantages and disadvantages and you essentially have to pick which set you want and live with it.
The stream has less cross contamination, but you have to more accurately apply the product to the felon/dogs face, the cone/mist is easier to hit with, but has a higher risk of cross contamination.
I can tell you when Officer Pepper Spray empties a 4oz cone mist can of Aerko Punch II, you can empty a whole floor of a Ramada Inn...