Implicit vs Explicit INNER

inner.sql

# Good: Specifying INNER

...
select a.email
  ,  a.created_at as expressed_interest_at
from helpscout.conversation a
  INNER JOIN
  helpscout.conversation_tag b
  ON a.id = b.conversation_id
where b.tag = ‘beacon-interest’
...

# Good: Omitting INNER

...
SELECT HC.`email`, DATE_FORMAT(HC.`created_at`, '%Y-%m-%e %T UTC') AS expressed_interest_at
FROM `helpscout.conversation` AS HC
JOIN `helpscout.conversation_tag` AS HCT ON HC.`id`=HCT.`conversation_id` WHERE HCT.`tag`='beacon-interest'
ORDER BY expressed_interest_at
...