Xeon E7 4870 's Advantages
Higher specification of memory (1333 vs 4)
Higher base frequency (2.4GHz vs 2.3GHz)
Lower TDP (130W vs 350W)
Intel Xeon Platinum 9242 's Advantages
Released 8 years late
Larger L3 cache size (71.5MB vs 30MB)
More modern manufacturing process (14nm vs 32nm)