Hi @César Ecos,
The ones listed in "Tested by Dynatrace" are officially supported and tested by Dynatrace while the ones listed in "Tested by DCRUM users" are not officially tested but are reported as having good results from customers contributing to DCRUM Community. As you can read from the doc page:
"Customers have reported positive results with the cards listed in the table below.
If you want to try an untested card to see whether it works correctly with DC RUM, you are welcome to conduct your own tests.
When choosing a card to test, be sure that your deployment adheres to the restrictions described in Ensuring NIC Driver Compatibility and that your card uses one of the drivers listed below."
Hope that helps.