Intel Xeon E3 1278L v4 's Advantages
Released 3 years and 1 months late
More modern manufacturing process (14nm vs 32nm)
Lower TDP (47W vs 130W)
Intel Xeon E5 4650 's Advantages
Higher base frequency (2.7GHz vs 2GHz)
Larger L3 cache size (20MB vs 6MB)