How have they made the right call while Samsung apparently made the wrong one with the size of he S4 if the iPhone 6 is physically larger than the S4 in every dimension other than thickness?
http://www.gsmarena.com/compare.php3?idPhone1=5371&idPhone2=6378
Yes, I know that's not final, but it's very likely at this stage.
Compared to most modern phones, iPhones have never made very good use of their physical dimensions. I would personally like more phones with a screen:body ratio closer to the LG G2/G3, Galaxy S4.