this might be easier and faster
http://www.displaywars.com/4,7-inch-16x9-vs-5,5-inch-16x9
Also, for fun, compare the old 3.5" 16x10 ratio (iPhone 4) with the awkwardly tall & skinny 4" 16x9 ratio iPhone 5. Wish they'd go back to 16x10 so I could actually USE that screen real estate.
The 3.5" iPhone screen ratio is 3:2, which is even closer to 4:3 than 16:10.