Intel Xeon E3 1275 's Advantages
Higher base frequency (3.4GHz vs 3.1GHz)
Lower TDP (95W vs 165W)
Intel Xeon w3 2435 's Advantages
Released 11 years and 10 months late
Higher specification of memory (4400 vs 3)
Newer PCIe version (5 vs 3)
Larger L3 cache size (22.5MB vs 8MB)
More modern manufacturing process (10nm vs 32nm)