Xeon X3470 's Advantages
Higher specification of memory (1333 vs 3)
Lower TDP (95W vs 130W)
Intel Xeon W3690 's Advantages
Released 1 years and 5 months late
Higher base frequency (3.466GHz vs 2.933GHz)
Larger L3 cache size (12MB vs 8MB)
More modern manufacturing process (32nm vs 45nm)