Nvidia 980 Ti 6GB, or AMD RX Vega 64 8GB?

I have been offered a choice between these two cards, and I'm not sure which one will perform better in linux at this point. If it was Windows I would just go with the Nvidia and call it a day, but the driver situation on Linux has me leaning towards AMD. Is the AMD the right choice?

I'm using the Garuda distro.