Intel Core i3 7100 's Advantages
Integrated graphics card
Higher specification of memory (DDR4-400 vs DDR4-2666)
Higher base frequency (3.9GHz vs 2.6GHz)
Lower TDP (51W vs 165W)
Intel Core i9 7980XE 's Advantages
Released 8 months late
Larger memory bandwidth (79.47GB/s vs 35.76GB/s)
Larger L3 cache size (25MB vs 3MB)