The ones that don't do much extra by policy don't qualify to have their root certificate included in browsers.
What do you mean by that? You suggested EV certs mean the CA sends boots on the ground and verifies the presence of your offices, But they don't.
In reality, what it means Is they ask you a series of questions whose answers will be checked using databases containing information gathered from public records.
Because OV certificates are the category you mention above, there isn't much extra qualification involved.
The CAs are not allowed to put in a Company Name they have not verified. They're basically just the same as the EVs. You upload some scanned documents, and then answer some questions, and you'll get either type of cert really quick,
except the EV has an arbitrarily higher price tag.