UHD+ infinity edge versus 4K UHD OLED

OLED screens are completely different technology from LED backlit LCDs.  

The have significant advantages for some over LED (much better black level, for one; lower power consumption for another), but they also carry significant downsides (they're susceptible to image retention "burn in", and they have much shorter lifespans than LED backlit screens).

Hi thank you for the answer,

Does it means that UHD infinity edge is better as Oled seems too much young?

regards

There is no one answer to that.  Each technology has its advantages and disadvantages vs. the other.  Only you can decide which you'd rather have based on your own research and on how you'll use the system.

In terms of picture quality, which one is better?