Intel Xeon E3 1258L v4 's Advantages
Released 5 years and 3 months late
Newer PCIe version (3 vs 2)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (47W vs 95W)
Intel Xeon X5660 's Advantages
Higher base frequency (2.8GHz vs 1.8GHz)
Larger L3 cache size (12MB vs 6MB)