M1 vs Intel macOS scaling differences

[KrisCris]

I am using DELL U2518D, a 2560*1440 display. Configured HIDPI using BetterDisplay, and tried both ways in the readme.

However,

There are some weird white (or black) outlines on the text edges⬆️, which is not the case on my old mac mini⬇️ (it uses one-key-hidpi):

The white border makes the text looks very blurry and weird, I don't know why would this happen.

[waydabber]

This is not a BetterDisplay or one-key-hidpi issue, the scaling engine produces a somewhat different result in M1 vs Intel. The effect is super pronounced (and imho annoying) if you invert the screen but should not be that noticeable for normal use. Supposedly the change in scaling is to improve sharpness.