Android Authority performed some preliminary tests of LG V30's display, which uses LGD's flexible P-OLED panels. AA says that the first impressions are very positive, and LGD's mobile OLEDs are highly competitive with Samsung's latest Super AMOLED displays (AA compared the V30 to the Galaxy S8, although to be fair SDC has since improved its OLEDs).
LG's color temperature is quite higher compared to the OLED of the GS8 - 8500K vs the GS8 7500K. On manual brightness both phones are able to reach almost the same brightness (421 nits on the V30, 398 nits on the GS8), while on automotive mode the LG reaches 606 nits and the GS8 only 535 nits (DisplayMate says the GS8 should reach 1,020 nits - but AA could not reach this high brightness in these tests). AA reviewers say that the LG V30 is quite comparable to Samsung's display in terms of black levels and vibrant colors.