Right query to get the current number of connections in a PostgreSQL DB

Question

Which of the following two is more accurate?

select numbackends from pg_stat_database;

select count(*) from pg_stat_activity;

Answer 1

From looking at the source code, it seems like the pg_stat_database query gives you the number of connections to the current database for all users. On the other hand, the pg_stat_activity query gives the number of connections to the current database for the querying user only.