Xeon X3440 's Advantages
Higher base frequency (2.533GHz vs 2.5GHz)
AMD EPYC Embedded 3255 's Advantages
Released 8 years and 5 months late
Higher specification of memory (2666 vs 1333)
Newer PCIe version (3 vs 2)
Larger L3 cache size (16MB vs 8MB)
More modern manufacturing process (14nm vs 45nm)
Lower TDP (55W vs 95W)