This is not the result of scientific testing, but in both houses I have noticed that my flashlights with Duracell batteries are getting ruined by leaking batteries. The crazy thing is that they are all Duracells. The batteries in my supply cabinet that leak and make a huge mess are all Duracells. I am very tired of the white powder from a battery leak, tired of feeling my skin burn even after washing with soap.
I don't know if it will be any better, but we plan to go to Costco after church tomorrow and I think I will try the Kirkland brand; probably cannot do worse.