TechPowerUp posted a review on the Intel Haswell Core i7-4790K vs. i7-4770K Comparison
A quote from the article:
Intel released the Intel Core i7-4790K, which created quite the stir with Intel Core i7-4770K owners. Does the Intel Core i7-4790K outperform the Intel Core i7-4770K in every way or does it fall a little flat? If you already own a 4770K, is the upgrade worth it?Intel Haswell Core i7-4790K vs. i7-4770K Comparison @ techPowerUp
