Wasp spray is cheaper. My pepper spray can is about the same size/shape of a wasp spray can, probably a little larger.Why would you get the hornet spray in your eyes if you are the one holding the can? It's also a lot cheaper than pepper spray or mace and a heck of a lot larger can.
I was referring to the person you're spraying's eyes. "I use wasp spray rather than pepper spray cause its cheaper" would get you owned in a courtroom when you're being sued b/c the guy you sprayed is blind.