Intel Xeon E3 1220L v3 's Advantages
Released 6 years and 10 months late
Higher specification of memory (DDR3-1600 vs DDR3
Depends on motherboard)
More modern manufacturing process (22nm vs 65nm)
Lower TDP (13W vs 120W)
Xeon X5355 's Advantages
Higher base frequency (2.667GHz vs 1.1GHz)