Intel Xeon E3 1558L v5 's Advantages
Released 5 years and 1 months late
Larger L3 cache size (8MB vs 3MB)
More modern manufacturing process (14nm vs 32nm)
Intel Xeon E3 1220L 's Advantages
Higher specification of memory (DDR3 vs DDR3)
Higher base frequency (2.2GHz vs 1.9GHz)
Lower TDP (20W vs 45W)