sure! Render quality is the scale or the application surfaces resolution. So 1 would be the size of the cameras viewport (1x1) and 2 would be double the size of the cameras viewport (2x2)
Render fidelity is how many layers are stacked in between . This will make models look more 'solid'. With sprite stacking you will experience 'gaps' between layers sometimes. By increasing the fidelity, you are essentially rendering layers in between layers.
Higher RQ or higher RF = worse performance So be careful with it. :)