I5 4460 on gtx 1060 or Rx 580?

I would have more fps in the above processor in games like minecraft + shaders and apex fortnite etc With the gtx 1060 6gb or the rx 580 8gb

The RX580.

In Fortnite you have a few fps less than the 1060, because the Unreal Engine is more optimized for Nvidia. But for other games, the RX580 is usually better!

The two cards do not give much, sometimes one is better, then the other. The RX 580 8GB is a bit cheaper and has 2GB more VRAM, but uses more power and gets louder like the GTX 1060.