Xeon 6740E 's Advantages
Released 9 years and 9 months late
Higher specification of memory (6400 vs 1600)
Newer PCIe version (5 vs 3)
Higher base frequency (2.4GHz vs 1.6GHz)
Larger L3 cache size (96MB vs 15MB)
More modern manufacturing process (5nm vs 22nm)
Intel Xeon E5 2603 v3 's Advantages
Lower TDP (85W vs 250W)