Typically the ones marked optional are non-whql, and the recommended driver is the whql driver. This is confusing as it is listed as optional but there is no longer a recommend driver on the download page anymore. The release notes don't say anything either, unless I missed it. So my answer is, I don't know. Thanks AMD!
I notice AMD does have the WHQL driver back on the download page. Thanks for fixing this AMD!
Most times you can find out before downloading,