Xeon E 2134 's Advantages
Higher base frequency (3.5GHz vs 1.8GHz)
Lower TDP (71W vs 225W)
Xeon 6756E 's Advantages
Released 5 years and 11 months late
Higher specification of memory (6400 vs 2666)
Newer PCIe version (5 vs 3)
Larger L3 cache size (96MB vs 8MB)
More modern manufacturing process (5nm vs 14nm)