Purple is my fave color so I'm biased and am gonna say purple
I like the look of purple more, or maybe like a blue? depends what kind of vibe you want to give though. green reminds me of robin hood or some other forest bandit/traveler, purple is more a sorcerer or witch-y color in my opinion. I associate it with spiders for some reason but maybe that's just me :/ Either way they both look great! Either could work