Samsung QN90A QLED vs Samsung QN85B

The Samsung QN90A QLED is much better than the Samsung QN85B for most users. The QN90A has a much better native contrast, so there's less blooming around bright objects in dark scenes, and it has much better reflection handling, so it's better suited for a bright room. On the other hand, whereas the QN90A only supports HDMI 2.1 bandwidth on one port, the QN85B supports HDMI 2.1 bandwidth on all four HDMI ports, so it's a bit more versatile, especially if you have multiple game consoles or a recent PC.