Well, to be pedantic, one is an absolute judgment, the other is a relative one. "Seldom" implies that a significant majority of iPhone critics do not let facts

Well, to be pedantic, one is an absolute judgment, the other is a relative one. "Seldom" implies that a significant majority of iPhone critics do not let facts get in their way. "Becoming more" implies that there is a trend towards freedom from facts, but does not place a judgment on the absolute degree of fact-freedom.