if you have only few websites that offer content, sure, the one with the best content wins. but iphone apps are a little different. they offer functionality mo

if you have only few websites that offer content, sure, the one with the best content wins. but iphone apps are a little different. they offer functionality more often than content. functionality can't vary by orders of magnitude as content can. so you have many iphone apps that pretty much do the same things, differing only in minor features. if the "primary" criterion isn't enough to make the decision, people turn to UX. feels obvious to me. if i had two websites (your example, not mine), and both offered almost the same content, i'd pick the one that appeals to me more. that's how i made my choice of search engine. the major ones hardly differ in the quality of their results.