Which is much safer

const medplum = new MedplumClient({ baseUrl: "http://localhost:8103" });
await medplum.startClientLogin(
    process.env.SUPERADMIN_CLIENT_ID as string,
    process.env.SUPERADMIN_CLIENT_SECRET as string
  );
await medplum.startClientLogin(
    process.env.PROJECT_CLIENT_ID as string,
    process.env.PROJECT_CLIENT_SECRET as string
  );

OR SHOULD I CREATE A NEW MedplumClient

const medplum = new MedplumClient({ baseUrl: "http://localhost:8103" });
const projectClient = new MedplumClient({ baseUrl: "http://localhost:8103" });