Intel Xeon E3 1220L 's Advantages
Higher base frequency (2.2GHz vs 2.1GHz)
Lower TDP (20W vs 35W)
Intel Xeon W 11955M 's Advantages
Released 10 years and 1 months late
Higher specification of memory (3200 vs 3)
Newer PCIe version (4 vs 3)
Larger L3 cache size (24MB vs 3MB)
More modern manufacturing process (10nm vs 32nm)