Xeon E6510 's Advantages
Larger L3 cache size (12MB vs 8MB)
Xeon E 2104G 's Advantages
Released 8 years and 4 months late
Higher specification of memory (2666 vs 1333)
Newer PCIe version (3 vs 2)
Higher base frequency (3.2GHz vs 1.733GHz)
More modern manufacturing process (14nm vs 45nm)
Lower TDP (65W vs 105W)