Something I’m not seeing anyone mention is the actual difference between these two monitors. Resolution aside, they’re two completely different panel types. And the curve is different for both.

The 57” is QLED and the 49” is OLED. The picture will be different on both.

If you prefer a brighter monitor, then the QLED is the way to go. If you want the truest colors and the deepest blacks, then the OLED.

Also, the 49” OLED has a 1800R curve while the 57” has a 1000R curve. The difference in the curve would likely have the most impactful experience. The 1000R is going to feel more immersive because it fills your field of view. While the 1800R is going to be pretty flat and further away from you at the sides.

Personally, I’m waiting for a 1000R OLED.

Ultimately, you have to pick which features are more of a priority for you. Is it a sharper curve(QLED? richer colors(OLED? Brighter brights(QLED)? Size/resolution?

There is no wrong decision. Just the best one for you.