Intel Xeon E5 2603 's Advantages
Larger L3 cache size (10MB vs 1.5MB)
Intel Xeon D 1527 's Advantages
Released 3 years and 8 months late
Higher specification of memory (4 vs 3)
Higher base frequency (2.2GHz vs 1.8GHz)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (35W vs 80W)