The 49" is an OLED 240Hz.
https://news.samsung.com/global/samsung ... technology
The Samsung Odyssey Neo G9 Gaming Monitor (Model Name: G95NC) lets gamers see new levels of detail with an unparalleled field of view. The gaming monitor delivers 7,680×2,160 resolution and a 32:9 aspect ratio in one screen for the first time.
Its 1000R curved 57” screen uses quantum mini LED technology with VESA Display HDR 1000 specification to deliver superior imaging in any gaming environment, from shadows to bright scenes. The Matte Display reduces light reflection on the screen, minimizing distractions during the most intense gaming sessions.
It also boasts the world’s first DisplayPort 2.1 support, which transfers data approximately twice as fast as the previously used DisplayPort 1.4. In addition, the new DP2.1 allows lossless industry-standard Display Stream Compression (DSC) to transmit information without distortion.
The Odyssey Neo G9 also supports a refresh rate of 240Hz so that gamers will not miss a thing during fast-paced gameplay.