Intel Xeon E3 1270 v2 's Advantages
Higher base frequency (3.5GHz vs 2.9GHz)
Lower TDP (69W vs 135W)
Intel Xeon E5 4655 v3 's Advantages
Released 3 years and 1 months late
Higher specification of memory (DDR4-2133 vs DDR3)
Larger L3 cache size (30MB vs 8MB)