Intel Xeon E3 1260L's Advantages
Lower TDP (45W vs 80W)
Intel Xeon E 2378G's Advantages
Released 10 years and 5 months late
Higher specification of memory (DDR4-3200 vs DDR3)
Newer PCIe version (4 vs 3)
Higher base frequency (2.8GHz vs 2.4GHz)
Larger L3 cache size (16MB vs 8MB)
More modern manufacturing process (14nm vs 32nm)