The camera geeks over at Digital Photography review compared the S4 with iPhone 5, HTC One, and Nokia Lumia 920:
Super Shootout: Samsung Galaxy S4 vs HTC One vs Apple iPhone 5 vs Nokia Lumia 920: Connect
tl;dr summary: it's a close call but the S4 does better in many common shooting situations.
Super Shootout: Samsung Galaxy S4 vs HTC One vs Apple iPhone 5 vs Nokia Lumia 920: Connect
tl;dr summary: it's a close call but the S4 does better in many common shooting situations.