They're both nice strains. I've not tried the Gorilla Zkittlez, I have the Auto og zkittlez. Was lovely. + you find fems are 2-3x nicer, generally stronger, cause any mistakes you can wait until she's 100% right before flipping. With autos. You gotta hit everything right to match anywhere close to a fems strenght. And even then, they don't match a properly grown fem with lil trouble and a high calyx to leaf ratio. When you need help. Mes me if you'd like.