Supposed benchmarks of the upcoming AMD Radeon RX 5600 XT posted on Reddit paint an interesting picture. The alleged 5600 XT scores place the GPU well above Nvidia's GeForce GTX 1660 Ti in most tests and outpace AMD's own Vega 56 GPU.
https://www.notebookcheck.net/Leaked-benchmarks-of-AMD-Radeon-5600-XT-beat-Nvidia-GTX-1660-Ti.448585.0.html