Strict mode is like 1/4'th of the safety that PostgreSQL gives you. Robust types for columns. Safe transaction semantics. Better tools for enforcing data consistency.
MySQL has a long way to go before it can give you the same security for you data that PostgreSQL does.
https://mysqlserverteam.com/mysql-8-0-2-introducing-window-f...
And MySQL has strict mode, which I believe is enabled by default on newer versions but available in any 5.x version:
https://dev.mysql.com/doc/refman/5.7/en/sql-mode.html#sql-mo...