Before we go any further, we should sort out what differences, if any, there are between LG Display’s OLED, POLED, or P-AMOLED, and Samsung’s Super AMOLED or Infinity Display as the company now likes to call it. As there are numerous terms floating around these days.
The short answer is that the basic underlying technology is very similar, baring some lower level manufacturing choices and, of course, how software configures and handles the display. Both are OLED displays, which means they are built from a matrix of organic light emitting diodes. Both are also built on active matrix technology (the AM in AMOLED), so that each pixels can be driven individually. The LG V30, Galaxy S8, and Note 8, are also all designed with a swanky looking curved edge, revealing that these panels are also build on a flexible plastic rather than a rigid glass substrate (the P in POLED or P-AMOLED).
Essentially, both LG Display and Samsung Display are basing their latest smartphone panels on plastic OLED designs. The differences boil down to manufacturing materials and methods, sub-pixels layouts, calibration, and software. But even these smaller hidden differences can make panels look quite unique.