Intel Xeon E3 1275 's Advantages
Higher base frequency (3.4GHz vs 1.8GHz)
Larger L3 cache size (8MB vs 6MB)
Intel Xeon E3 1258L v4 's Advantages
Released 4 years and 2 months late
More modern manufacturing process (14nm vs 32nm)
Lower TDP (47W vs 95W)