Intel Xeon E5 2665 's Advantages
Higher base frequency (2.4GHz vs 2GHz)
Larger L3 cache size (20MB vs 16MB)
Xeon E 2278GEL 's Advantages
Released 7 years and 3 months late
Higher specification of memory (DDR4-2666 vs DDR3)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (35W vs 115W)