MYSQL Drivers

The database in my 8.5.1 site using MYSQL5.7 has a driver of c5_pdo_mysql. upgrading this to Concrete 9.1.3 and MYSQL 8.0 I carried on using driver c5_pdo_mysql.
When I do a clean install of 9.1.3 I get a database with driver concrete_pdo_mysql.

What is the difference between the two driver?

Concrete CMS rebranded from Concrete5 → Concrete CMS within that timeframe so that might be the only salient difference there.

Yes, I can see the sense in that and expect there’s something deep down in the documentation that confirms that. Thanks