Xeon E7 4820 's Advantages
Higher specification of memory (1333 vs 3)
Higher base frequency (2GHz vs 1.8GHz)
Larger L3 cache size (18MB 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 105W)