The wasp spray, they told her, can shoot up to twenty feet away and is a lot more accurate, while with the pepper spray, they have to get too close to you and could overpower you. The wasp spray temporarily blinds an attacker until they get to the hospital for an antidote.
It's also one he wants everyone to hear. If you're looking for protection, Glinka says look to the spray. "That's going to give you a chance to call the police; maybe get out." Maybe even save a life.