Intel Xeon E3 1265L v3 's Advantages
Higher base frequency (2.5GHz vs 2.2GHz)
Lower TDP (45W vs 250W)
Xeon 6731E 's Advantages
Released 11 years late
Higher specification of memory (DDR5-5600 vs DDR3)
Newer PCIe version (5 vs 3)
Larger L3 cache size (96MB vs 8MB)
More modern manufacturing process (7nm vs 22nm)