Both models support a resolution of 3840 x 2160 pixels at 60Hz and have 178-degree viewing angles, 6ms "fast" response times, and 1000:1 contrast ratio. The 23.8" model has 300 nits brightnes and 8ms "typical" response time, while the 27" edition has 350 nits brightness and a typical response time of 9ms.
The stands are adjustable every which way, and they can be swapped for VESA-compatible mounts. Connectivity includes a four-to-one USB 3.0 hub, an MHL-compatible HDMI port, a DisplayPort input, and a DP output that supports daisy-chaining a second screen.
Source: The Tech Report