I voted for brane, mainly because of the more muted colour palette used. For me, the colours suit the seasonal a lot more, and instead of being heightened, allow for a sorta naturalistic look, complimenting the butterflies.
I like the contents of TwilightBlade's image more than brane's, but the high contrast is quite a turn-off for me, personally. It's definitely more of a personal preference than anything else, but it definitely does impact in my voting.
Good luck to both of you.