Intel Xeon E5 2658 's Advantages
Released 2 years and 1 months late
Newer PCIe version (3 vs 2)
Larger L3 cache size (20MB vs 8MB)
More modern manufacturing process (32nm vs 45nm)
Xeon EC3529 's Advantages
Higher specification of memory (1066 vs 3)
Higher base frequency (2.133GHz vs 2.1GHz)
Lower TDP (65W vs 95W)