Xeon X3480 's Advantages
Higher specification of memory (1333 vs 3)
Higher base frequency (3.066GHz vs 2.276GHz)
Lower TDP (95W vs 130W)
Intel Xeon E7 8860 's Advantages
Released 11 months late
Larger L3 cache size (30MB vs 8MB)
More modern manufacturing process (32nm vs 45nm)