Graphene. But they're in trouble (and technically so is Calyx). Calyx is not a replacement for Graphene: it's like saying i replace my safe with a stitched pocket.

Graphene is security first, and they have really high standards. But they're a security oriented distro, so you have to have user discipline to make the privacy part work. Calyx is more of a privacy but not so much security build, so you don't get actual security in favor of de-googling.

Ultimately it's what you value most. If you feel like you need real-life security, then GrapheneOS is the way to go. If you just want goog to not know you, but dont care about borders, governments and police, then calyx may do your job for you as long as you realize you are vulnerable when taking a flight or when the govt turns against you.