So, I've been comparing my mini-led super ultrawide (2160p) with my oled super ultrawide (1440p). They both have near perfect blacks. The mini-led has some light bleed, or a halo effect, but it's not as bad as traditional led. The oled does not have light bleed. The colors look better on the oled. The mini-led is brighter and has better hdr. I prefer the OLED in picture quality, but I prefer the mini-led for the resolution. Samsung needs to drop that oled 2x4k super ultrawide. It would be the perfect monitor (or at least once nvidia drops dp 2.1)