JOINS on NULL vs WHERE on NULL

Assuming you're joining on a table with soft deletes, do the following queries do the same thing?

Is there a reason to prefer one over the other?

SELECT * FROM users 
JOIN documents
  ON documents.user_id = users.id AND documents.is_deleted IS NULL;

SELECT * FROM users 
JOIN documents
  ON documents.user_id = users.id
WHERE documents.is_deleted IS NULL;

Here's the sample schema:

CREATE TABLE users (
    `id` int NOT NULL AUTO_INCREMENT,
    `name` varchar(255) DEFAULT NULL,
    PRIMARY KEY (`id`)
) ENGINE=InnoDB;

CREATE TABLE documents (
    `id` int NOT NULL AUTO_INCREMENT,
    `user_id` varchar(255) DEFAULT NULL,
    `doc` text,
    `is_deleted` tinyint(1) DEFAULT NULL,
    PRIMARY KEY (`id`),
    KEY (`user_id`)
) ENGINE=InnoDB;

INSERT INTO users (id, name) VALUES (1, "bob");
INSERT INTO documents (id, user_id, doc, is_deleted) VALUES (1, 1, "doc 1", 1);
INSERT INTO documents (id, user_id, doc, is_deleted) VALUES (2, 1, "doc 2", null);

The explain plans are equivalent:

mysql> explain SELECT * FROM users 
    -> JOIN documents
    ->   ON documents.user_id = users.id AND documents.is_deleted IS NULL;
+----+-------------+-----------+------------+------+---------------+------+---------+------+------+----------+--------------------------------------------+
| id | select_type | table     | partitions | type | possible_keys | key  | key_len | ref  | rows | filtered | Extra                                      |
+----+-------------+-----------+------------+------+---------------+------+---------+------+------+----------+--------------------------------------------+
|  1 | SIMPLE      | users     | NULL       | ALL  | PRIMARY       | NULL | NULL    | NULL |    1 |   100.00 | NULL                                       |
|  1 | SIMPLE      | documents | NULL       | ALL  | user_id       | NULL | NULL    | NULL |    2 |    50.00 | Using where; Using join buffer (hash join) |
+----+-------------+-----------+------------+------+---------------+------+---------+------+------+----------+--------------------------------------------+
2 rows in set, 3 warnings (0.00 sec)

mysql> 
mysql> explain SELECT * FROM users 
    -> JOIN documents
    ->   ON documents.user_id = users.id
    -> WHERE documents.is_deleted IS NULL;
+----+-------------+-----------+------------+------+---------------+------+---------+------+------+----------+--------------------------------------------+
| id | select_type | table     | partitions | type | possible_keys | key  | key_len | ref  | rows | filtered | Extra                                      |
+----+-------------+-----------+------------+------+---------------+------+---------+------+------+----------+--------------------------------------------+
|  1 | SIMPLE      | users     | NULL       | ALL  | PRIMARY       | NULL | NULL    | NULL |    1 |   100.00 | NULL                                       |
|  1 | SIMPLE      | documents | NULL       | ALL  | user_id       | NULL | NULL    | NULL |    2 |    50.00 | Using where; Using join buffer (hash join) |
+----+-------------+-----------+------------+------+---------------+------+---------+------+------+----------+--------------------------------------------+
2 rows in set, 3 warnings (0.00 sec)