iPhone 6 Plus: Based on our extensive Lab tests and measurements, the iPhone 6 Plus is the Best performing Smartphone LCD display that we have ever tested. It delivers uniformly consistent all around Top Tier display performance. The iPhone 6 Plus is only the second Smartphone display (LCD or OLED) to ever get all Green (Very Good to Excellent) Ratings in all test and measurement categories (except for Brightness variation with Viewing Angle, which is the case for all LCDs) since we started the Display Technology Shoot-Out article series in 2006, an impressive achievement for a display. The iPhone 6 Plus has raised the bar for top LCD display performance up by a notch. See the main Display Shoot-Out Comparison Table for all of the measurements and details.
The iPhone 6 Plus matches or breaks new records in LCD Smartphone display performance for: Highest Peak Brightness, Lowest Screen Reflectance, Highest (True) Contrast Ratio, Highest Contrast Rating in Ambient Light, most accurate (pure logarithmic power-law) Intensity Scale and Gamma, most accurate Image Contrast, and the smallest Variations with Viewing Angle for Brightness, Contrast Ratio and Color. Where the iPhone 6 Plus display does very well but does not break LCD performance records is in: Resolution (1920x1080 versus 2560x1440), Pixels Per Inch ppi (401 ppi versus 538 ppi). and Absolute Color Accuracy (3.1 JNCD versus 2.1 JNCD).
iPhone 6: The display on the iPhone 6 has almost identical performance to the iPhone 6 Plus but it only has a 1.0 Mega Pixel display, significantly lower than the 2.1 to 3.7 Mega Pixels found on all of the other leading Smartphones. While its 326 ppi and 1334x750 resolution qualifies it as an HD Retina display, there are a number of other significant advantages for exceeding the limits set by normal 20/20 Vision. It is particularly important to have as many pixels as possible when digitally rescaling images from their native resolution to the display that they are being viewed on. Most rescaled images look noticeably better on the iPhone 6 Plus with 2.1 Mega Pixels compared to just 1.0 Mega Pixels on the iPhone 6. In addition, even at the native display resolution, fine text and graphics look better on the iPhone 6 Plus if you look carefully and closely at the screen (because you may want to or need to).
That is true. The 6 actually has slightly better display specs than the 6+ but it's so close the differences are negligible and not discernible to the average user. The PPI difference, however, is noticeable...hence why displaymate crowned the 6+.
I had a 6 before my 6+ and it was fairly easy to see pixels and some jaggedness to the text at normal viewing distance. I have yet to see a pixel on the 6+.