You mean as a user with devices? For the most part you don’t know. At the moment, you’d know because you’d have opted into a channel: Preview | SmartThings-managed Edge Device Drivers
At the moment, you can go into graph and look at you list of devices and if the DTH is listed as “placeholder” it’s a Driver. You can also use the CLI, smartthings devices will show the package key of a driver. In the app [Edit: Android only ATM, the iOS release got delayed] you can also click the ... on the device card and there’ll be a “Driver” item that will show you which driver for a lua driver based integration.
Though, for the most part, when interacting with a device, you shouldn’t see any difference.