Intel Xeon W 2191B 's Advantages
Higher base frequency (2.3GHz vs 2.2GHz)
Lower TDP (140W vs 205W)
Intel Xeon Gold 6438M 's Advantages
Released 5 years and 1 months late
Higher specification of memory (4800 vs 2666)
Newer PCIe version (5 vs 3)
Larger L3 cache size (60MB vs 24.75MB)
More modern manufacturing process (10nm vs 14nm)