Intel Xeon E5 4640 's Advantages
Larger L3 cache size (20MB vs 16MB)
Xeon W 1390 's Advantages
Released 9 years late
Higher specification of memory (DDR4-3200 vs DDR3)
Newer PCIe version (4 vs 3)
Higher base frequency (2.8GHz vs 2.4GHz)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (80W vs 95W)