It basically 1px difference, but depending the color scheme of shapes/background looks like the top shape has a stroke.
I just posted the screenshot with zoom to exemplify my doubt.
If i put the right colors in the shapes and use at scale 100 or less it “masks” the bottom layer. I made this post just to see if it has another way to “mask” this ‘stroke’ that appear sometimes, without changing the colors.
Thanks for your time.