I would say Frivole because I like how they sit up on the earlobe. I have them in WG.
When I purchase from a particular jewellery house, it must be a distinctive design to the brand. I don't want to know that there are many copycat (or generic designs) pieces that i can get cheaper. To me, it lessens the value of what I pay for vis-à-vis VCA.
With that said, try them ALL - and purchase only what makes your heart flutter most (and I don't mean at the price).
I wish the design team at VCA had also tilted the wings on the BTF designs a bit, instead of making them so flat. Then it will really look like a butterfly in flight.