Xeon E 2488 's Advantages
Higher base frequency (3.2GHz vs 1.8GHz)
Lower TDP (95W vs 225W)
Xeon 6756E 's Advantages
Released 6 months late
Higher specification of memory (6400 vs 4800)
Larger L3 cache size (96MB vs 24MB)
More modern manufacturing process (5nm vs 10nm)