Intel Xeon E5507 's Advantages
Higher base frequency (2.266GHz vs 2GHz)
Lower TDP (80W vs 205W)
Intel Xeon Gold 6438N 's Advantages
Released 12 years and 10 months late
Higher specification of memory (4800 vs 3)
Newer PCIe version (5 vs 2)
Larger L3 cache size (60MB vs 4MB)
More modern manufacturing process (10nm vs 45nm)