Intel Xeon E5 1660 's Advantages
Higher base frequency (3.3GHz vs 2.7GHz)
Lower TDP (130W vs 270W)
Intel Xeon W 3365 's Advantages
Released 9 years and 4 months late
Higher specification of memory (DDR4-3200 vs DDR3)
Newer PCIe version (4 vs 3)
Larger L3 cache size (48MB vs 15MB)
More modern manufacturing process (10nm vs 32nm)