Samsung Galaxy S4 vs Galaxy S III: Advanced fence-sitting - GSMArena.com tests
Ben Wood on Twitter: "Samsung Galaxy S3 vs Galaxy S4. Very evolutionary but with bigger screen and improvement in finish. http://t.co/dNuLDQvwsr" / Twitter
Hands-on with the Samsung Galaxy S4: Digital Photography Review
Comparing the Samsung Galaxy S4 and the Galaxy S3 - CNET
Samsung Galaxy S4 Review
Samsung Galaxy Note 3 vs. Galaxy S4
Samsung Galaxy Note 4 vs. Samsung Galaxy S3: What We Know So Far
Samsung Galaxy S4 - Wikipedia
Samsung Galaxy S4 review | TechRadar
Samsung's Galaxy S3 Battery Problems now Plaguing the S4 - Patently Apple