Intel Xeon E3 1280 's Advantages
Higher base frequency (3.5GHz vs 3.15GHz)
Lower TDP (95W vs 300W)
AMD EPYC 9455 's Advantages
Released 13 years and 6 months late
Higher specification of memory (6000 vs 3)
Newer PCIe version (5 vs 3)
Larger L3 cache size (192MB vs 8MB)
More modern manufacturing process (4nm vs 32nm)