Opteron 1381 's Advantages
Higher base frequency (2.5GHz vs 2GHz)
Intel Xeon E3 1505L v5 's Advantages
Released 6 years and 4 months late
Higher specification of memory (2133 vs 1333)
Newer PCIe version (3 vs 2)
Larger L3 cache size (8MB vs 6MB)
More modern manufacturing process (14nm vs 45nm)
Lower TDP (25W vs 115W)