The first way is to send data through port pci express and the other way is to send video and audio with maximum speed hd 10gbps (usb 3.0 times higher).
The first way is by sending data through port pci express best alternative video and audio signal is HD with maximum speed of 10Gbps (higher than USB 3.0 only)
The first is the data sent through PCI Express ports and the other is a video and audio with a maximum speed of 10 HD Gbps (higher than 3.0 times the USB).