Ray Soneira, President of DisplayMate Technologies, conducted a shootout between the iPhone 4 Retina Display and the Samsung Galaxy S Super OLED Display. He concludes (in part):
The iPhone 4 by far has the brightest and sharpest display and is the most power efficient of the displays... The Samsung Galaxy S by far has the lowest screen reflectance and largest Contrast for both bright and dark ambient lighting, and the best viewing angles. On the flip side, the iPhone 4 has a weak color gamut and viewing angles... and the Samsung Galaxy S has lower brightness, excessive color saturation, higher power consumption and some sharpness issues.
The article also includes incisive comparisons with the iPhone 3GS, Motorola Droid, and Google Nexus One. "Super" LCD versus OLED - which is better and why - what are their relative strengths and weaknesses? Soneira's results are based on extensive scientific measurements and visual tests.
The master color coded Results Table and a Highlights section that incisively summarizes the major results for each smartphone plus:
Super LCD versus Super OLED
iPhone 4 versus iPhone 3
Super OLED versus OLED
Winners versus Losers
It's an excellent read and further cements the Retina Display's reputation as the best display on the market.