POLED stands for Plastic OLED. Historically these have not been the best displays. I cannot comment on how good the technology is now, but I suspect it will not be at the level of what Samsung is offering. Typically POLED displays have not been able to get as bright, and generally had tendencies to be too red, green, or blue, most common being the reddish (more like magenta) tinge to the display.
Here is an article that discusses the POLED technology
http://www.androidauthority.com/poled-vs-amoled-792869/ (Unfortunately it also does not credit the original article discussing this in any way...an article that predates this one by a few years).
The last phone that used a POLED display that I know of was the BlackBerry Priv and that was hardly a stellar display.