I'm the project lead for both projects. We're still in the process of supporting all the function from pgvecto.rs in VectorChord (int8, more than 2000 dim vec, etc.). We'll provide the migration docs for pgvecto.rs users to VectorChord. User will have better experience with VectorChord due to better integration with postgres storage system. We will stop supporting pgvecto.rs early next year when everything on VectorChord is ready.