Intel Xeon E 2124 's Advantages
Released 6 years and 2 months late
Higher base frequency (3.4GHz vs 2.6GHz)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (72W vs 115W)
Intel Xeon E5 2689 's Advantages
Higher specification of memory (1600 vs 4)
Larger L3 cache size (20MB vs 8MB)