Intel Xeon X5492 's Advantages
Higher base frequency (3.4GHz vs 3GHz)
Lower TDP (150W vs 250W)
Intel Xeon W 3345 's Advantages
Released 12 years and 10 months late
Higher specification of memory (DDR4-3200 vs DDR2)
Newer PCIe version (4 vs 2)
More modern manufacturing process (10nm vs 45nm)