Intel Xeon E5 2665 's Advantages
Higher base frequency (2.4GHz vs 2GHz)
Intel Xeon E5 2628L v3 's Advantages
Released 2 years and 6 months late
Higher specification of memory (1866 vs 3)
Larger L3 cache size (25MB vs 20MB)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (75W vs 115W)