According to this test site: Galaxy Note 4 and Note Edge OLED Display Technology Shoot-Out
Based on our extensive Lab tests and measurements, the Galaxy Note 4 is the Best performing Smartphone display that we have ever tested. It matches or breaks new records in Smartphone display performance for: Highest Absolute Color Accuracy, Highest Screen Resolution, Infinite Contrast Ratio, Highest Peak Brightness, Highest Contrast Rating in Ambient Light, and the smallest Brightness Variation with Viewing Angle.