OK Google read my email
OK Google is a great tool but it is a jack of all trades. Speaking Email is designed with one purpose - to read your email. We can compete with Google and Apple by being more focused on this task.
For example, Google Assistant does not have the intelligent content detection of Speaking Email, which results in a lot of headers, disclaimers, footers and signatures being read out. Speaking Email also has a much clearer concept of context - you can take actions on the current email such as mark as read, archive, delete, reply or forward.
Instead of "OK Google read my email" say "OK Google open Speaking Email".