Intel Xeon E3 1284L v4 's Advantages
Released 9 months late
More modern manufacturing process (14nm vs 22nm)
Lower TDP (47W vs 135W)
Intel Xeon E5 2643 v3 's Advantages
Higher specification of memory (DDR4-2133 vs DDR3-1866)
Higher base frequency (3.4GHz vs 2.9GHz)
Larger L3 cache size (20MB vs 6MB)