Postgraphile is more open-ended and advanced, which could be better for some cases. I really like it and enjoy writing the PostgreSQL directly. Prisma compresses the domain a little more than Postgraphile, which means its a little simpler.

The Prisma datamodel very closely mirrors the GraphQL schema. It has just a bare minimum variance to allow different data types (and maybe something else I'm forgetting). I think the generated GraphQL for the database client ends up being simpler and easier to debug; but that's just my feeling about it.

The Prisma database admin tool at `host:port/_admin` is nice; and compliments the GraphQL Playground really well. Prisma develops GraphQL Playground as an open-source project, inspired by GraphiQL which comes out-of-the-box with graphql-server.