Intel Xeon E3 1275 v3 's Advantages
Released 2 years and 1 months late
More modern manufacturing process (22nm vs 32nm)
Lower TDP (84W vs 95W)
Intel Xeon E3 1290 's Advantages
Higher specification of memory (DDR3 vs DDR3)
Higher base frequency (3.6GHz vs 3.5GHz)