Intel Xeon E3 1220L v3 's Advantages
Lower TDP (13W vs 140W)
Intel Xeon W 2191B 's Advantages
Released 4 years and 3 months late
Higher specification of memory (DDR4-2666 vs DDR3-1600)
Higher base frequency (2.3GHz vs 1.1GHz)
Larger L3 cache size (24.75MB vs 4MB)
More modern manufacturing process (14nm vs 22nm)